I have been an HP printer(s) owner for as long as I can remember...Never Again! Never! Never! Never! (I wouldn't wish an HP Printer on my worst enemy!). I guess my big, ignorant mistake was thinking just because I own an HP laptop an HP printer would be a perfect fit, much like putting a Ford part on a Ford. IT DOES NOT WORK THAT WAY WITH COMPUTERS. HP software conflicts with each other, in addition the HP printers come with so many additional useless programs that you can't keep from being installed on your computer when setting up the AIO. On top of that, if one tries to remove those extraneous programs the uninstall process will most likely remove a critical file that is needed for the HP Laptop. I almost always had communication and/or shut down problems with my HP computer when using HP printers, specifically the All In Ones.I had heard good things about Lexmark and after reading hours and hours of reviews on several Lexmark printers including this one, I thought I would take the leap of faith and buy it. I almost purchased it at Office Depot and paid (way too much) $170 plus tax. I restrained myself and went online, found it, you know where for $99.99 with free shipping.The Print quality is outstanding, I have always had ink jet printers and it's print quality is as good as any of them. It's not a laser printer but if you are concerned about the difference in print quality between the two types, you need some real problems in your life. The set up is quick and brainless, the Wireless feature is far better than any wireless HP AIO I have ever used or owned (Please see updated reviews below). I have had some communication issues but they seemed to be related to the timing of trying to print at the same time my security software was updating. The Scan feature, again outstanding. Scan to a flash drive, file, PDF or email whatever, it all works excellent. It has Abbyy Optical Character Recognition software for scanning, which is most useful, all automatically activated when working from the computer. It's hard to screw up Faxing these days and this Lexmark does it just like most all other AIO's, perfectly. I have used the Flatbed Copier to copy single sheets but again that is a process that was perfected centuries ago. I have not used the Auto Document Feeder: I have not read a single complaint regarding that feature so I am confident that once I need to use that feature it will perform seamlessly. The print speed is very good but I am usually only printing a couple of pages at a time. It prints rite quickly; again if seconds mean the difference between a good (fast) printer and a slow one, somebody needs 'real' problems. I have had some failures at the two sided printing but I know I am doing something wrong, as again all of the reviews were very favorable. All functions can be controlled at the computer OR at the printer. The unit comes with FULL Extended Life ink cartridges, 1 black and 3 color; not your basic introductory cartridges like with HP, and they are cheaper than HP ink. I always check the price of replacement ink before purchasing a printing device: To often the "sweet smell" of a low priced printer/AIO is soured by the "foul aftertaste" of high priced replacement cartridges.I am using a Linksys wireless 802.11B (dinosaur) router, this AIO is supposedly not compatible with the new faster Routers (N?), although the newer routers are supposed to address the crux of compatibility. I have read many complaints about the so called, reverse compatibility of these newer routers and how they may not be so reverse compatible in all cases, so if you are using the latest technology in routers, I would confirm the compatibility and prepare yourself for possible issues, but if Lexmark's performance is directly consistent, you should have no problems, just contact Lexmark and confirm its compatibility first. If this one isn't compatible, the next Prospect Pro in series most likely is.Basically, I can't believe that an AIO of this quality and features can be sold for $100 and still be profitable. I would buy this all over again just to have a back up. It goes without saying that I would recommend this unit if you are looking for an AIO. I would faithfully compare it up to $200 and even a bit more. This AIO is truly a Good Buy. I can't review all the features of this AIO, there are many, but I can say I have zero complaints of the features I have used (See updated reviews below). I am really impressed that it only comes with the pertinent software needed to fully use the unit. And (although I have not had to use it(See updated reviews below)) it comes with full support and once you register your ownership with Lexmark, the warranty goes from one to five years. I also looked at Canon and Kodak. Canon was the only other company I found that produced an AIO that had comparable features for the price and had a high percentage of favorable reviews.(March 25, 2010)The communication issues experienced, as described above, seem to have been recified. Lexmark has very recently (3/5/2010) released a Firmware patch that addresses a wireless communication issue along with issues pertaining to the Auto Document Feeder. After downloading and installing this patch, the 'sleep/wake-up' problems I was experiencing have not resurfaced. Also now having used the two sided print feature I can say it works well. The Delay time can be adjusted for your region.(August 31, 2011)This unit is useless. Don't buy it, unless you like headaches. The "Claim" of 500 or so pages per ink cartridge is misleading. I have experienced no more than 150 pages per black ink cartridge. The ink is very expensive making the "real" cost per printed page very high. The print head has had to be replaced twice. Communication issues still exsist. Warranty has always been there, Lexmark will stand behind it but it is your time.....You should be able to do much better from a different manufacturer.