Posted 08 February 2013 - 20:28
I did, very recently, i own a MSI U135DX and changed from a 160GB 5400RPM to a OCZ 60GB SSD, as others have said the difference is night and day, it really seems to unlock the machine.
If possible try and cram as much ram as you can in, i managed to get mine up to 2GB,
Also i recommend Windows 8, you can't run metro apps, but the increased performance and better battery life (the start screen i think works well on a netbook with a small screen, easy to click the icons) make it a worthwhile upgrade.