I have the Forester 3171 cousin to the Sunseeker 3170. I have a 13 year old son and a 14 year old niece that comes on many of the trips with us and both have done very well with this floorplan. I reviewed a lot of bunkhouse class C units: Thor, Jayco, Chateau, Leprechaun, Winnebago - just to name a few. It was an exhausting experience but I had already been through two tt and knew what I wanted and didn't want. The Forester had just about everything I could want.
The pluses over the other class C's we looked at were the enclosed utility compartment (sewer and electrical), great bathroom design (the most cabinet area by comparison), outside storage compartment (among the best in space utilization), a very comfy bed in the bedroom, as someone mentioned - the bottom bunk that is a sofa with rated seatbelts, and just overall storage space inside the coach. The low built-in step well was a plus too but most class C's are coming with them now.
My soon loves the bunk area - mainly the bottom bunk where as my niece chooses the over-cab bed. It gives her a lot of space up there and her own zone (with the 32" TV all to herself once everyone goes to bed).
The hydraulic levelers is a personal thing - kinda like the extra TV outside; some like it and want it, some don't. I like them. It is something else to maintain but its not that big of a deal. As far as the added weight goes, its less than 150 pounds per leveler and its part of the chassis. I don't get that close to my gross weight capacity that I have to worry about it.
I can't really think of any minuses except I wish we could access more of the kitchen cabinets with the slide in but it's not that big of a deal. We just plan ahead and have some utensils pulled out before retracting the living room slide.
In June we did a 18 day 4700 mile trip in the coach with 4 people and a dog and towing our Equinox, the coach did perfect for us. I would not have done that same trip with my tt and truck.
(I was not paid for this endorsement