Pros Tons of features and dual USB2 ports.
Cons Can be very hard to revive if FW update fails.
Summary I can only say I am very happy with it, despite a problem i had. I got it when it first came out and it works just as it's supposed to.
I must admit I had some problems with it as I had a powerout while I was updating it and it resulted in a dead router, I tried to get it back to life but as the Asus customer suppert is as ohers point out of no help at all. I contacted Asus support and told them my unit was dead after a failed FW update due to a city wide powerout, but I was just told to return it to the place where I bought it from however the place I got it had gone out of business. I asked if there was another place I could send it to have it repaired but to no avail.
So I packed it away and got my self a new router a D-Link DIR-615.
However over the next 3 years I contnued to research the matter and see if any other had experienced the same as me and there was. So finally after having read page after page on various forums of people having the exact same problem as me, but where no one had found an answer to the problem I got more than a little stubborn as having an expensive router just laying dead.
So once again I took out the router and hooked it up then tryng all the things I could think of and read of that could help. Only one major problem with the Asus Recovery software that comes with the router, it does NOT tell you what port to connect it through to make it accept the restore command. I tried the WAN port as so many times before but that didn't work so with nothing to lose I then tried the LAN 1 port and Eureka it WORKED! It got the router back in business... Now over 2 years later it still runs on the Asus own 1977 FW and I am NOT gonna tamper with it again that's for sure. I have it hooked up at my moms place as her ISP is not very compatible with many brands so far only NetGear and Asus routers works on their lines, I have tried both D-Link and Linksys as well but they won't connect at all, but they all work perfect at my place. So Asus it is.
Pros Fast, problem-free wireless
Ease of administration
No hiccups in connectivity
Cons Limited print server options
Summary The WL-500g that I bought new five years ago has given me little reason to replace it. N-Routers might be moderately faster, but for the expense, if you want real bandwidth, run Cat 6 for video streaming apps.
I've been using my WL-500g for the main wireless router for the household, setting up a Photosmart 2600 on the USB print server. Works well. I also keep my bios up to date, and this has probably kept me from having the issues of some of the other users, or it was the luck of the draw. With hardware, you can't always tell these days.
Pros Looks pretty
Cons Wireless decides when it wants to work - unstable!
Summary The ASUS WL520GU has unfortunately always given problems, so much so that it stayed in the box, where it was more stable. Tried updating the firmware several times with no decent results. Updated the firmware to DD-WRT with a much improved interface to use on another project, but once again the wireless was intermittent and was regularly receiving IP conflict errors from other computers on the network when using DHCP. Time to back in the box - I mean bin!
Would not purchase another ASUS product after this fiasco
Pros WPA encrpytion, print server for both USB and parallel ports
Cons Intermitent and frequent disconnects while connected; slow in sending print jobs
Summary Although this Router and print server has loads of features, don't waste your time and money on this device; you'll be kicking yourself. I got it as a replacement to an old US Robotics router/print server (because one of my new laptops didn't pick up its signal) which worked much more consistently than this one. I exeperienced speed drop offs and disconnects for no obvious reasons while using a Centrino laptop. After a couple of months of constant tinkering, I switched back to my old 802.11b router/print server and using an ethernet cable now for that machine. I'm sticking with the older and much more reliable router.
Pros More features than can be counted
Cons More flaws than can be counted
Summary Now, let me start by recommending that any super-great reviews be disregarded as they were most-likely posted by somebody who had only used the router for a day or so.
I've had this router for over a month, and it has been a big handful, to say the least. If it wasn't one problem, it was another, and I'm not afraid to be specific. The built-in DNS server which handles DNS requests using the DNS servers set or picked up by DHCP isn't functional in any released firmware I have used, for one thing--that means you have to tell the router to give out one of your ISP's DNS servers or manually-assign it rather than the router's IP address. Another problem in some firmwares is that the WAN side will just "die"--aka, the internet is gone. A problem I've had and may still have (it's too soon to tell for sure) is that wireless clients will experience random connection drops. Yet another problem that I myself have experienced is that when devices have been off for a while, when they turn back on they may have trouble accessing certain LAN machines (go figure with that odd issue).
Then come the custom firmwares! They're out there, and they improve the router radically, fixing some of the problems ASUS has yet to address. However, only so much can be done in custom firmware, so some issues are still present in certain custom firmwares (like the wireless client connection dropping).
Now that some of the worst is over with, I'll briefly address the goodness the router has to offer. It has a ton of features that most people will never care to use, such as a print server and a USB port for a webcam. It has advanced firewall capabilities (*cough* though ASUS's non-custom-firmware defaults may leave you a bit vulnerable), and an FTP server, and all sorts of great things.
The custom firmware has better features and allows you to set options and firewall rules more specifically (using iptables). This is nice.
But what's the point of any of this if it's as unstable as grandpa's bowel movements? .... Well, it is.
This router will suck away all of your free time if you attempt to fix its problems. I've spent weekend after weekend trying to fix its problems, and my recent vacation time was drained as well. Don't let this router take you, even though it has some of the best features available at a great price.
ASUS is basically dead and won't respond at all, and their site's support features are pretty much down.
My recommendation is to suffer with few features and another router, sadly. Sorry for the rushed review, but I need to get back to trying to fix this stupid thing.