I'm the latest example of switching to an SSD. In the past I was using the LR1,2,3,4 with 5400k rpm drives, 7200k, and finally the 10k RPM VelociRaptor. Well, with my new laptop, I finally decided to upgrade the HD and find out more about the SSD's that people talk about. The performance boost with an equal RAM is just unbelievable. Obviously my processor got upgraded. But man, when I took out that Samsung 1Tb 5400rpm drive and put in a Samsung 840 256Gb SSD the performance boost was just crazy out of the box. I'm now running a trial Lightroom 5 beta and love every bit of it. My files are opening up faster, I can see previews faster, something I always missed with a lagging mechanical drive.
To make the long story short - once you use SSD, there's no going back. But make sure it's a quality one to ensure the pleasant first experience 


