Acekard21i or DSTWO which is better for a noob

My gf is getting a DSi soon and I plan on getting her a flashcart. However shes never used a dsi or flashcart before and i haven't used a dsi compatible flashcart (always used r4 on ds lite). I know DSTWO has built-in emulators but I don't think she'll use them. Which would be easiest to interface with for someone who has no experience with one and which would maintain (firmware updates and such)? All she needs is to be able to play backups with ease she has no interest in homebrew.

if you dont care of any of the extras, then get acekard 2i. here is a guide i made for acekard. it has everything you need to know about it: http://forum.romulation.net/index.php?topic=52218.0

dstwo is better in every way but for a noob the acekard will do