"Great printer... until the ink-filling reared it's head"1.5 starson by testtubewaltz
Pros: autoduplexing is wonderful, quality and speed are respectable
Cons: Microchip in ink cartridge will not allow refilling!!!
Summary: I have only encountered recently the aspect of this printer which changed my opinion of it from a 9 (it's a really nice printer, overall) to a 4 or 5, mostly because it's an insulting defect.
Printing... works great.
My BEEF with the IP-4200:
1. The printer uses individual ink tanks.
2. Each tank has a visual prism for detecting low/no ink conditions.
3. Each ink tank now also has a microchip (think "killer chip" of an epson inkjet or lexmark laser cartridge) to record ink usage.
The physical refilling the cartridge isn't a problem(same as the BCI-3K series, and on the pixma 4000 series), but it will land you in the following scenario:
1. The microchip on the cartridge colludes with the computer (calculating how much ink you've used) and notices that you've printed a suspiciously high number of pages from the cartridge, and pops up a dialog with effectively two choices:
CHOICE THE FIRST: (Cannon's preferred choice): Admit that you've refilled your ink cartridge, remove it, and place a new cannon certified cannon manufactured ink cartridge in it. I achieved approximately 420 pages in a refilled "300-page" pigment black cartridge.
CHOICE THE SECOND: (The insulting option):
Conceed that you are refilling your ink tanks, with the following consequences:
1. The warrantee is voided, and this fact is written into the flash-rom of the printer, thus barring you from claiming service under warrantee period, even if the failure is unrelated.
2. The visual ink-monitoring system is DISABLED. Completely. Without a good reason, other than scaring you into buying cannon ink. (Or, rather, if you've chosen choice the second, being spitefully punitive you for doing so. Once the "I admit I refill my ink" choice has been selected, there is no way to return to the "good graces" of their warrantee.) In plain english, the consequences of a disabled visual ink monitoring system are that you will not receive warning when your ink runs low (even though the hardware is present to do so), and that your print heads and ink plumbing will dry up into a crusty sad little crisp, squeak their last little squeak, and die. Then you purchase a non-cannon printer. (May I reccomend the IP4000, or the IP5000, neither of which have the chipped ink bottles).
Voiding the warrantee, I can understand. Disabling the ink monitoring system is simply, spiteful BS from some heartless bottom-feeding bottom-liner.
To Canon, for making an affordable, dependable, high-quality duplexing printer: Kudos. You've done well.
To Canon, for their spiteful business plan:
A seven page fax, with the letter F on the first page.
My next printer will be something other than a Canon.