Dont get it if you want a ds slot 1 cart get an m3 ds simply they are the best and very easy to use, also microsd cards are very cheap; I got a 1gb real one for my m3 on ebay for £5 = $9.
I have one. It's really sweet. I have about 8 or 9 games on there now. So really you save a lot of money. You can hold a lot of games on there and download more to keep on your comp. and it's only the pirce of about 2 and a half games (DS games retail for 50 bucks right?).