IT'S AWESOME!
Yea, its also expensive but considering how long I think it will last, it's really a fair price when you consider the quickness of not only set up, but take down time.
Camping is supposed to be fun, relaxing and without the pressures of every day "Do this do that". The ease of setting this thing up and putting it away eliminates the "Ugh, I'm not going to shower tonight because it's a pain in the ass setting up my Bush league shower system". 'Nuff said about that, tight?
I ordered it directly from the distributor. I think that link is posted a page or two back. They were on back order but if I remember right, it still only took 6 weeks.
I have not used it while running the furnace (I live in the south) ... but other than that, I see no issues with its mount location. I have a 2016 side dinette.
It's possible to mount with one person but two people make it MUCH easier.
The bottom right mount hole is located about 31" forward from rear back corner of camper.
The top edge of the shower box is mounted even along the caper tops bottom edge.
A cardboard pattern (with mounting hole position) should be made prior to drilling mount holes - check inside for hole positions as well) just to make sure everything is as wanted.
The shower box should be raised slightly away from side of camper wall in order to keep the camper tops edge from hitting it. It should be raised away from outer wall to allow for walls top moulding edge to clear underneath as well.
You can do that with these:
https://www.ebay.com/itm/Four-Pack-Penn-Elcom-9106-Rubber-Cabinet-Foot-2-5-Dia-x-1-H-Heavy-duty-Black/371955015134?hash=item569a3f1dde:g:a6wAAOSwGotWjVdh
I think I used 3/8" stainless bolts/lock nuts (lock nuts on the inside of camper) along with fender washers inside. I don't remember the length of them. You may have to drill the shower box mount holes bigger for 3/8" bolts.
Take your time if you decide to do it but imho, its more than worth the 2 day hassle it is.