Otherwise, the system really fits the capabilities of your machine. I have no problem to install it on a PC 5 years old and on a netbook. The system is very stable, so far as was XP. I had very few compatibility issues: just a capricious printer, all my software work.
Incidentally, if you have XP, I highly recommend you to WINDOWS 7 INSTALL ON A SCORE SECOND [in dualboot], to keep Windows XP in parallel. This will allow a smooth transition and save yourself the disappointment if some of your applications refuse to run on Seven.