If you've seen the first, the second will be just as enjoyable, if not better. Great surprises, that's if you've seen the first, and it's got a good deal of comic relief. Imo, it's a great adventure film, go for it!
I liked it, but I thought 1 was funnier. I missed creativity here, and I really didn't like the end. But they'll make it good next Summer I'm sure. In trilogy's I never like the second part so much