I played through this game a few days ago...It really sucks, lol.
The battle system is rather fast paced, but it gets quite simple as things progress.
You start out at level 1, and all of your opponents are atleast level 2. This is quite an unfair balance at the beginning, though once you get a level up, everything gets easier from then on.
The problem that I had, was that there hasn't been a Beyblade game that I have seen to date that' as cool as the actual show. The two Beyblade games I've played are this one, and one for PS1. They both sucked ass.
Happy trails.