We just camped in our 179 and found the storage reasonable and the space workable. Particularly like the back kitchen and black water flush system. Lights are awesome too. Our wishes are few:
1. The Rdome does not fit the rig very well and the suction cups are pretty lame. I was going to say worthless but a couple of them did hold for a bit. We got a wind gust and the whole dome flattened and then resurrected itself. The outcome was one bent pole. Not too bad. The carry bag is super cheap. Ripped first time out.
2. The back curtain track. Can you really not figure out how to make it work smoothly?
3. The bathroom sink - not a good idea. Can't you make it easily removable?
Otherwise - kudos for a great floor plan and nice interior. Suits us to a T.