Yeah, the only good SSD's out are either Samsung and Crucial. The Sandisk and PNY are not as good performance wise as the Samsung and Crucial brands. At least according to what I have read online. I have a 120gb Samsung Evo SSD.
Literally the only difference I notice between it and the HDD is when my desktop appears on startup, I literally can open programs (outlook, adobe, ie, etc) instantly with NO lag. I am serious, as soon as the desktop appears I start clicking and opening programs!