This is a real tough call for me...I still haven't picked up the NinjaDS but now I need to figure out if I want this...I love my G6 and I mean I SERIOUSLY love it...however I'd love to store DS games in the GBA slot as well as the NDS slot. I wonder how much battery life this will eat up. Not to mentio if your running this and a gyro sensor on the GBA slot...hmmm. The NinjaDS is just so cheap I can't help but to want one...This on the otherhand I am interested but the cost of this when I already have so many kick ass solutions...I will probally pass on this one and just stay with the NinjaDS. My main concern is A) Loading some games in the DS slot and B) being able to occasionally free up the GBA slot to use gimmicky shit like rumble and gyro packs. Personally I am not to happy about all these add on packs as I really don't want to carry my GBA games, a rumble, a ram expansion and gyro sensor...just seems like a lot of shit to carry. Hopefully only a few games will use these "expansion" carts. So far I heard the rumble pack sucks so thats not even a concern right now.