[r00fus]

Not sure about others, but in my case (10 MBP 13" w/ Vertex2 in optibay), I had occasional stalls (anywhere from 2-30 sec) until the TRIM Enabler ( http://www.groths.org/?p=308 ) showed up and I installed it (OSX Lion supports TRIM on this drive natively, it seems).

I think this is because, although sandforce drives have native garbage collection, it can sometimes happen at a very inopportune moment (like say, a 20s "pause" during critical moments of a SC2 game).

[ugh]

By the way, do not use that Trim Enabler. If you want to and are aware of the risks, use this one, especially if you plan on using it with Lion: http://digitaldj.net/2011/07/21/trim-enabler-for-lion/

What this does is actually pretty simple, it replaces the string “Apple SSD” (used to identify for which drives trim is turned on) in a file in the relevant kernel extension with zeros. It also creates a backup copy of the original file.

The Trim Enabler you linked to replaces a whole kernel extension (meaning you might end up with an older version of a kernel extension) which is obviously monumentally stupid.