I have a Flip 4 as well as the Boombox. The Boombox is nice and sounds great, but the sheer size of it can be a lot. I love the Flip as I can just throw it in my bag and head to the pool, beach, patio, etc..
I think it all depends on your overall use but just be prepared to carry it. 9/10...
I go just for the treadmills and the 24/7 aspect of it. I do a lot of distance running so having a nice treadmill for $10 a month at odd hours is worth it to me.
But I have a membership at a regular gym as well for all the other times.
Absolutely insane. I bet they'll have no problem selling them though. People who can afford something like this definitely have a couple other options in the garage already.