The overall boot time hasn't changed since my bios takes about 15s to detect it, but the feeling once it's booted is really great.
When I doubleclick open office it shows me the loading picture with full loading bar, one second later the window comes up.
It's definitively the best tuning you can do if you want an everyday performance boost. Gimp takes only 2-3s

And my laptop really isn't that fast, 12" core2 1,8ghz + 2gb ram. I've got my ssd from ebay - 32gb for 50€.
I haven't done any sector size tuning so far, will try that later. (I've read 128kbyte shall be the best for SSDs)