1. Make sure that when you see the pictures of the M3 DS Real you're buying, that the website on it says "www.m3adapter.com" and not "www.m3adaptes.com" as the one with adaptes is a fake and cannot run Sakura.
2. If you're getting the bundle that comes with a card reader, DO NOT USE IT. It will virtually kill your card and make it so your computer won't even detect it.
3. If you want to play GBA roms and also use the opera browser I suggest getting the bundle that comes with the GBA expansion and not the rumble. Because the GBA can play roms and it also works as a RAM expansion. While the Rumble expansion isn't that exciting (trust me it isn't, it only works on like 4-5 games and it will randomly make very loud rumbling sounds if you take it out and put it back in while the DS is off).
4. Don't stay with touchpod, it's touch screen functionalities suck. Trust me, just get the latest Sakura and get a good skin and you'll love it.