I was curious about that myself, but haven't tried it yet. Here's a thread that has some feedback (only 3 ppl, tho). It's a fairly high traffic forum, you might post your question there:
I just installed my 2 x25-m 80gb in Raid 0 and installed a bunch of stuff 50% of my 160gb
i didnt use an image but i started the installation program from an external-hd
After done installing W7-office-photoshop-antivirus-all the W7 updates-acrobat-couple of games....
I used Crystaldisk (i didn't screen shoot it) then i ran Tony Trim and again Crystaldisk to be honest my performance were never gone down it was
3XX(i actually forgot how much was here exactly)-160
before and after running it
So i am not sure if it does really work as my performance were still too high to notice any difference but for sure it doesn't hurt them