Most of my games are from PSN Store. In other words, they reside on my Hard Disk rather than optical media. After changing to SSD, there's significant improve in loading times. The other question is, what about the reduction in storage capacity? Each game is around 50-70GB. With a 500GB SSD drive, you still can hold at least 5 games. Well, if you delete them, you can always download them back. Just backup the savegame files.

Some games like God Of War or Tomb Raider may not benefit much from it as the developers cleverly hide the loading transition. Unless you do a lot of fast-travel. Huge benefit on fighting games, Fallout and Skyrim.