As an adult I enjoyed Legoland a lot! I think you'll have lots of fun.
Definitely plan on spending the whole day, you'll need it to see everything and do a show or 2.
Not sure when you are going but since it is closer to the water it tends to be a bit cooler there.
The food is really expensive-worse than DL IMO so be sure to bring your own water at least if that's an issue for you. But that's my only complaint, we had a great time there!