I loved the DS games but Coded in my opinion, was the worst game in the series. I was able to get past the whole "this is a stupid concept" thing because KH2 established computers play by Tron rules. However, the entire story could have been covered in a 3 min cut-scene and the game play was the same as BBS. I thought the growth system was alright, it’s nice to have that much control over character growth but it made me miss Days' panel grid system. I know there is a lot hate for Days but I LOVED THE PANEL SYSTEM. It made powering up your character into a puzzle.
I think I am one of the few people in the world it seems who thinks KH2 is one of the best games in the series. I started playing Kingdom Hearts when Chain of Memories first came out without having played any of the others and I loved it. Unfortunately, I never got a ps2 until 2007 so I was able to play KH1 and KH2 back to back with no expectations. I think my lack of (or even low) expectations helped me enjoy KH2 much more than the ones who had to wait 4 years for it.