Re. The RWVs, yes there's a room taken up by a treatment room, however the space between each RWV is huge, they are SO well spaced out. We didn't feel like the space was wasted having a treatment room there, the RWV was big enough anyway. The space between each RWV though is great, tis like you have no neighbours! And the bathtub is magnificent! I don't think there's a similar tub in the DWV.