I'm not exactly a long-time Mac user, but bought the last of the PowerPC iBook's in 2006 and a 24" iMac in 2008. Decided to go the Hackintosh route after being disappointed by the iPad.
I set mine up a couple of weeks ago and am very pleased. Setup was a breeze; a couple of minor glitches easily fixed. That said, I don't think it can match your experience with your MacBook Pro. Unless your MacBook is pretty old, I can't imagine the processor and graphics card in the 10v can match its power.
I don't use mine for music. Regarding video, my experience with YouTube has been that the graphics card can't handle resolutions above 480. At resolutions of 720 and above, the playback freezes up or gets choppy. If the video experience is important to you, this might be a deal-breaker.
I was looking for a lightweight, cheap device for email, Web browsing and maybe some occasional word processing with GoogleDocs or OpenOffice. The 10v fit that bill nicely. "Readability" helps cut down on some of the scrolling on Web pages with lots of text.
Wiwa, thanks for the tip on color. That helped, but it still could be better. Ari, how exactly did you do your color calibration?