It's a good game for what it's worth, all the main characters are awesome and the world has some pretty cool areas to explore. I wouldn't like to compared it to the other borderlands games since it's a much smaller and a different game.
The side quests are alright, only a few really stand out to me, mainly the ones with references to other media. The rest are a little forgettable.
the weapons are fine, a few are very fun to use but the variety isn't there. The meelee weapons though, are a real highlight for me. A bunch of spells are pretty fun too, namely the dragon lord skulls and the electric talons.
Anyways. DON'T BUY THE DLC UNLESS IT'S SUPER CHEAP. It's not worth it, honestly should've been free.