Summary: It mostly works from my wife's XP laptop, except that its driver software is rather obtrusive and is perpetually trying to sell you more ink. My Ubuntu laptop is 100% unsupported. Not only do they not provide a driver, but they refuse to provide the community with any details about the protocols such that we can create our own driver. I suppose it's my bad for not researching that before buying it, but I'll sure never buy another thing from Lexmark again.
Summary: I bought the Lexmark x9575 after returning the Epson Workforce 600. I loved the Epson but their idea of 2-sided printing is flipping the paper and putting it back in paper tray. I own my own business and need the speed and conveneince of automatic duplex printing. The Lexmark is difficult to set up. I'm an IT guy and configured my own network, even then I had to call and spend 30 minutes with an out-sourced support department. They couldn't figure it out.
Summary: The overall construction and setup are good including the wireless. The system is a bit louder than my HP K60 that this was suppose to replace. The photo quality is good but less than the quality of the canon PIXMA series. However, I didn't attempt to fine-tune the photo optons. The biggest problem is the software will not allow you to share or use peer-to-peer networking for this system. (confirmed by tech.