Pros Battery life is superb
Not heavy, feels comfortable in the hand
Build quality feels pretty solid
Phone is easy to adjust
Screen quality is actually very nice
Call quality is pretty good
Cons Does not (yet) support the App2SD feature
Less pixel density than Note 2
Summary I've been using this phone for a couple of weeks now and I'm certainly not disappointed!
Just a note, expect some attention when using this phone. A lot of people I know have commented on my new purchase. Some bad, some good.
The body design is akin to the Galaxy S4, except on a much larger scale. Relatively thin bezels keep this phone from being unwieldy and I am able to hold this phone in one hand comfortably (although I do concede that you'll need both your hands for the majority of operations).
I can comfortably fit this phone into a pair of Topman slimfit jeans, which I was surprised about. It's actually pretty portable. It can be a little finicky whipping the phone out in a snap, but it doesn't bother me that much. I must admit I didn't take it out the last time I went on a night out as I didn't want to end up breaking it if I fell over in a drunken stupor.
Battery life is superb. I am confident that you can easily make it through a day of heavy use without needing to charge. With light use you could probably make it ~3 days without charging, without any battery saving tweaks. It's hard to believe that such a large screen wouldn't just suck up all that power, but since it comes in pretty light on the specs, the monstrous 3300mAh battery has plenty of juice to keep you going.
The phone isn't too heavy and feels comfortable in the hand. The thing that adds most of the weight is the battery, but when you have this much space, a big battery is a must.
The build quality feels pretty solid. Obviously the back is removable so you can access the battery and SIM tray, but again, the back is pretty solid (It is plastic, but I don't have a problem with plastic).
The phone is easy to adjust to. I swapped from an iPhone 5 to this and didn't feel overwhelmed by the size (surprisingly). Using any smaller phone than this now just feels tiny and cramped. The screen real-estate this phone offers is fantastic and I thoroughly appreciate every pixel!
Spec-wise, this phone is definitely mid-range. In real terms, the phone performs pretty well. It's relatively snappy and is overall a pleasant experience. I have experienced lag in some areas on occasion, usually when scrolling in an intensive app, or letting the homescreen load after booting up the phone, but it's easy to overlook. Can play games pretty well (handled Monsters Ate My Condo pretty well, not tried GTA or any similar game yet), which is nice considering the screen size.
Screen quality is actually very nice. Yes, it has a low pixel density and is only 720p, but in reality, you probably won't notice. Coming from the iPhone 5 screen, I couldn't really pick much fault. Everyone I have shown the phone to has complimented the screen quality. The only people I could see disliking the screen on this would be spec snobs.
Call quality seems to be pretty good. I didn't have a problem holding this phone to my ear but if you feel you may look a bit silly doing so I'd suggest to invest in a Bluetooth headset.
If you like to tinker with your Android devices, this may not be the best phone to pick up (unless you're a developer of course). Developer support is pretty low on places like XDA, but there are working rooting methods if that's what you're in to. You'd be better off with the S4 or a Nexus if that's your main priority (although you do sacrifice screen size for it).
Unlike the S4, the Galaxy Mega does not (yet) support the App2SD feature (installing apps to the SD card), which makes 8GB a tight fit and your 64GB SD card rather limited in its usage. I am hoping that the App2SD feature will be supported in the future, but I can't find any information saying that Samsung will be doing so. There's not even a rooted option (beside FolderMount, but that isn't exactly the same as installing apps to SD card).
Overall, a top-notch phone for the price. It loses a star for the bit of lag I've noticed and the lack of App2SD. Besides that, a great for phone for those that are looking for a big screen at a not-so-big price.
PS: before you buy, I suggest to check for best offer at: Smartphonesmore.blogspot.com/p/samsung-galaxy-mega-63.html
Hope it helps.
Pros I actually went from a Note 2 to the Mega because of the larger screen. I had people telling me that the Note 2 is a better phone but I disagree. The larger screen is for me but I'm sure its not for everyone..
Cons Its a little tight in my pocket so portability may be an issue for some. I have no other issues with it..
Summary I have owned many smart phones but this is my favorite. If you like to watch videos, I highly recommend this phone..
Pros Nice phone.
Cons Screen cracked within 3 weeks just from pushing the button on the right side of the phone to black the screen out.Samsung WILL NOT WARRANTY.