We absolutely love our 3300RLB. Like boat to 5er said, the Sundance is a mid-profile so the front room will be a little short. The Big Horn, Big Country and Landmark are high profile rigs, so they have more headroom in the front. Never had a problem using the shower. I'm 5'8".
The kids just love the back room. And we had guests stay with us a few times this summer and the back room worked out perfect. We keep our's on a seasonal campsite year round, so we used it a lot this year.
I wanted something that I could have for a lot of years and not have a wasted bunkroom when the kids stop coming. The 3300RLB fit the bill perfect. The back room doubled as a den this year when the kids didn't come.
You won't be disappointed.