I had always wanted a rowing machine. Only problem: nowhere to store when not in use. When I saw the Whipr, I was instantly sold and ended up getting it with my stimulus money and as a present to myself for getting a new job. I've found that I have zero excuses to work out now, as all I have to do is just inflate the back of it and I can get a quick row or SUP workout before starting my day, rather than drive to the gym, change, work out (if the machines I want to use are even available), then get dressed again. While the demos show it working with a door, anything heavy will work just as well. I use a chest of drawers or a bookshelf.
All in all, it's a great product for those looking for a truly portable home or home away from home gym. You truly get your money's worth without the sacrifice of quality. Assembly of the rowing/paddling machine takes about 5-10 minutes.