This SSD greatly improved my boot time, load times, and Windows Experience Index (WEI). My boot time before this drive was over 3 minutes, after installation, it was down to 49 seconds! Programs load in an instant. WEI is now bottlenecked on my GPU. Haven't had any boot issues or program freezes. But I would highly suggest buying two... after my Windows install, I had about 75 gigs. If you have a bunch of Steam games, this will fill up pretty quickly. I tried installing games on my other drives, makes it a little choppy just because the read/write speed on the HDD isn't the best.