Summary: Bought it in 2005, if I recall correctly. It's now nearing the end of 2013. Connected to home network, so I can print from any machine in the house. The ink is replaceable, one color at a time, and without buying new print heads, so it's significantly cheaper to operate than most other inkjets. I bought it for the low cost per page, and have been very satisfied with that. And, well, all these years later, it still prints fine!
Summary: I have used printers from most of the major manufacturers. I got fed up with HP inkjets and switched to canon a couple years ago. My first Canon was an iP4000. The photo quality is amazing (the best I've seen in this price range by far), the prints are fast, it can feed from two different trays, and it can print on small photo paper borderlessly.
Summary: I finally upgraded from an ancient (but still working) CanonBJ, and I'm very happy with the results. Setup, including connecting through my wireless router, was a breeze; printing is speedy whether through my desktop or laptop; photo quality is great. Letter-size paper in the top feed and photos/envelopes in the tray offers good flexibility. I had trouble installing the Canon "Easy Web Print" on my laptop for some reason, but it isn't an essential feature.
Summary: The unpackaging and ink cartridge instructions are concise and easy to follow. Pop the Pixmaip CD into your PC and follow the directions to install the printer on your wired or wireless LAN. You'll also automatically install the printer drivers, setup the printer device on your PC and load software useful for picture viewing and editing. Printer setup was a no-brainer and thus far the Pixma ip400R has been totally print reliable.
Summary: This is one amazing printer. The print quality is outstanding. Photos look professional, they look exactly the same as photo-lab prints. Black text looks laser quality and the WiFi feature lets me print from anywhere in my house, from any one of my computers.
Summary: Does everything it advertises. Borderless printing and duplex printing are the s**t. The wireless printing is cool too but its up to you to decide if it's worth the extra $$$. As for me, I am totally satisfied.
Summary: Have had the wireless version for a couple of months and am extremely pleased. Print quality is superb, and I am still in awe at how well photographs come out. I just wish there was an easy way to do 5x7 (4x6 seems to be the biggest possible).
It is a little slow in printing, but I think that may be more of a wireless "dead spot" than anything else. It also appears to be very economical on ink.
Summary: I have had and liked a number of Canon printers. The combination of an I850 with the print server in the Apple Airport Express just did not work reliably. (But was better than the hassle of having to connect the laptop to print.) So when my son needed a printer, I looked around and decided to give him the I850 and buy the iP4000R. I did the setup in the kitchen, which after reading the manual, was easier than I expected.
Summary: I needed another printer and was very glad I came across this model . My husband has a laptop and was never able to print anything unless he hooked up to the printer or had me do it for him . Now we never have that problem anymore ! Our Canon Pixma 4000R is hooked up to our wireless router and Voila ! We can both print now !