Its good for when you can only afford a 20-30GB SSD, with a 64GB SSD you don't need to do any caching as you can get everything (OS+games) on the SSD.
No, a 20gb ssd is no good with smart response technology as it quickly fills up the cache while swapping between games ect and causes it to lose older data thus becoming useless while wanting to play your favorite games.

You would be happy to waste the OP's valuable money on stuff because its "Black" etc, instead of getting the best performance possible for his hard earned money.

