This plug adapter is fine and does work, surprisingly you have to buy it in addition to the toilet. The cord that comes with the toilet is a coiled cord but requires wired to a 5 volt supply. The fan that this operates should be a 12vdc fan not 5vdc so it can be wired to a standard 12vdc system that is in nearly all vans, rvβs etc.
This being a non-coiled cord can be a problem if your toilet is on a slideout tray. It can get caught while sliding the tray back into place.
A solution is to take this adapter and splice the coiled cord onto this wall plug adapter. This really should be offered and be included with the purchase of the toilet. These simple improvements would make the cost of Cuddy toilet a little more acceptable.