Just grabbed this from the E-shop the other day, and I love it. It's similar to the old school roller coaster tycoon games but with a lot of great new items, after you build the coaster you get to ride it! It makes great use of the wii you gamepad. Building the coasters is super easy with the wii u's touchpad. Also you can watch the ride in first person from the gamepad which is a lot of fun. I would say if you get a chance you should definitely play this!
My review in video form can be seen here