Price aside, Papa, the SSDs are the cat's PJs. It's almost instant on when you reboot. Apps take no time flat to start up. I put one into my tower and love it. The MBP that my school got me has one as well, and I've noticed that periodically the system will purge RAM all on its own. I got a 256 GB drive for the tower, and it didn't cost all that much. I guess you need something larger, though, so cost may be a real consideration.
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