[quote name='kevgret']Is there alot of backtracking? Does the map do a good job of guiding you where you have to go next?[/QUOTE]
No backtracking unless you're going for Shinies. If you are, then expect lots of backtracking unless you get each Shiny when you see it at first. Having the map on the lower screen is pretty awesome when navigating the "world map", and is pretty cool for figuring out if you're going in the right direction for a shiny you saw earlier.
[quote name='girfreak']how is the 3d effect on this? I have it on PC[/QUOTE]
It's pretty standard fare. You have characters and text in the foremost ground, most of the background in behind them, and then the backmost layer (space or . . . not space?) behind that. You see the background through windows and the like and it does end up looking pretty cool. Not a required 3d experience by any means, but fun.