I have an M3 Real with SAKURA and i've been hearing that the CycloDS is better. so let me know if I should upgrade to a CycloDS.
The CycloDS IMO is a very good flashcart, plus with Moonshell 2 it is almost the same as M3 Real with a few new features so I'd advise you to get it if you want one of the best flashcarts for the DS.
The only drawback to the CycloDS: It doesn't work on a DSi. Other then that, it's the best supported card with the best features. I love mine. ^_^
ditto to luna
for a ds phat or dsl, you can't do any better.