my point of view: easy to use.. and fun..
1:it is, sadly, still not completed if you could say so..the next version will probably be even better
2: nvm.. see anwser 1
3: not functional.. yet .. when it gets that function .. yay..
PS. aaand.. on the sav from yer ds game...
if you have a flashkart of any kind ... .. take the sd card from that and put in computer..
i assume you have a normal game?