I've got one of these, in fact I write all my reviews on it now. I bought it at my local auctions just over 2 years ago & I'm still getting great use out of it. It looks sleek with its all black case, keyboard & mouse.
It's really easy to do upgrades on as it requires no tools to open the case or remove any parts. I upgraded the dvd-rom in mine to a rewriter & it took minutes to do & was as quick to get running & burning with.
It might not have a super high powered graphics card but the on-board chip handles games pretty well. I've been able to play both Quake 4 & Half Life 2 at fairly decent speeds.
The port to fit a graphics card is a slightly annoying issue as it's intended for a standard PCI card & I was expecting to find an AGP port but I guess thats the price you pay for buying what was only ever really intended to be a business machine. On-board sound is very good, the 1gb of RAM that comes as standard is more than enough for what I use it for.
It runs on Windows XP Professional (but I was annoyed that they didn't supply back-up cd's or dvds for any of the software on the machine) & it runs plenty quick enough for my liking, also handling all my peripherals through its 6 usb ports (though the 4 at the back are badly placed, I'd rather see sockets on 1 side of the case).
Its a nice machine, the Lenova badged name might confuse those who don't know IBM recently changed their trading name. I'd recommend it or its successors. Its a reliable workhorse that will keep on going.
(modified review from Ciao)