MacBook Pro updating to SSD
Recommending specific brands and models can be tricky (and this list will probably be out of date in weeks), but at the moment some of the SSD models that get positive comments from Mac users include:


Samsung 840 Pro series
Samsung 840 Evo series
Crucial M500
Sandisk Ultra Plus


As long as the drive doesn't require any additional software to be installed, you can be almost certain that the drive will work fine with OS X. That said, once you've narrowed down one or two models I'd recommend doing a brief search online to see if there are any drawbacks or known problems, just to be on the safe side.

TRIM won't be supported with a third-party SSD, but you can use TRIM Enabler to work around that.

Personally, I have several Samsung 830 and 840 drives and a Crucial M500 and can recommend them all highly (top of the pile would be the 840 Pro).