I much preferred the way to the 2 screen were setup in heart gold, with the menu in the bottom screen instead of having to click X all the time. The graphics have got worse. The pokemon are unoriginal. No challenging pokemon trainers, i think all pokemon games should have a trainer like trainer red in heart gold, it gets boring if you keep battling a weak elite four. I hate the bag, i actually find it difficult to find an item.
I do like the 3D houses. It is also much quicker to give your pokemon items like protein then on other games.
Overall it's fairly poor compared to heart gold