The other thing worth noting is that class HD use the human con-bonus, animal HD use the animal con-bonus.

There is nothing quite like trying to explain to a player that they now have 6d6+6 hp + 2d8+8 hp. In the end, I explained it as 'shut up and eat your wolfsbane...'

I think the lycanthropy could probably use some work. Most players just shouldn't be given that kind of power. DR 5/silver doesn't sound like much until you end up realising that very few people use silver weapons. The stat-bonus for a were-bear is pure twinky goodness as well... (Str +16, Dex +2, Con +8???)