For anyone who has more than three PS1 games, your going to need one of these. Now that PS2 is out, these really aren't in demand as much, since many kids are just jumping on the gaming band wagon with the PS2 and have no PS1 games to speak of. For all us others who have been around since the SNES was a baby (me being 16) it is almost a guarantee you'll need, and probably already own one of these. Obviously this is your only choice, and it does what it promises, it saves your games, and will keep them their, inless you wash it (an infuriating mistake.) Unfortuneately, this is a very inconvienant way to store data, since there are only 15 blocks, and many games can take upward of three blcoks just to save one file. Since these aren't in demand in much these days, they're also very cheap. I own about 50 PS games, and hav the saves spread across about 4 memory cards. I found a great deal at target, that can get you three memory cards, just like this one, for the same price as this one. Another alternative to the space dilemma is getting a super memory card, that can have upward of 100 blocks of saving space for just a bit more cash.