As promised heres m 2 cents on my OCZ Summit 120gb SSD.
Its worth noting that I have come from raid 0 (2x) velociraptors so was somewhat skeptical about a singal SSD being faster....but was very eager to try SSD tech out
Instantly upon boot a notice this system loads fast hardly any delay soon as the desktop shows its ready for work, same goes for shut down its very fast big improvement.
All in all the O.S itself feels snappier and more responsive things move faster and smoother, you double click and its there in a flash...flash LOL
Not much more I can say its very hard to explain it but I have come from raid 0 velociraptors which is about the fastest HDD available and they are fast, and there is significant noticeable improvement, SSD is the way to go!
I have left the raptors as storage (games etc) to help keep the OS junk free I feel this is the best compromise as SSD's are cheaper but still expensive.
Would I recommend?.....Yes I would highly recommend SSD's just stick to a good brand/model such as Summit, Vertex and apparently Intel
SSD's are worth the upgrade one of very few things that live upto the hype!!!