I have the 64GB STEC in mine and it has seemed fine under both Windows 7 (Build 7057) and Mac OS 10.5.6--it is nowhere near as slow as I had anticipated based upon all of the comments here. Of course, the random write speed for small files is piss-poor, but that is the case with any cheap SSD
. The read speeds with the STEC are great, consistently above 60MB/s. If you run Windows 7, you might want to look into Diskeeper Hyperfast 2009 (yes, it's a lame name); while Diskeeper is technically a disk defragmenting program, the Diskeeper HF version is only for SSDs, using a different mode of operation to 'prime' previously used (but not yet erased) cells on the ROM during system idle, so there are more contiguous free cells to write to and the drive doesn't have to spend as much time shuffling data around. In Mac OS, I just disabled filesystem journaling and it seems to work fine.
Considering all of the reliability and quality control problems that the RunCore brand of so-called "ultra-fast" SSDs have, I'm keeping my STEC drive until all the QC bugs are sorted out for these faster drives.