When MTM launched the new bottle and adaptor, they copped a lot of flak for it supposedly being a half assed job. Personally, I think what they did was quite smart as it addressed a major flaw in the previous model, as in the narrow bottle opening, but it also allowed existing customers to upgrade their older foam cannons. It can also be used to upgrade a non-MTM foam cannon.
Some of the early reviews complained about the bayonet style attachment between the bottle and cannon adaptor. However, it's actually really convenient compared to winding in and out a threaded connection and eliminates the possibility of cross threading. Some also complained that the adaptor plate would unwind from the foam cannon body, but I've been running three of these setups and have not had this problem.
If you grip the cannon like this, you wont have issues with the threads loosening...........................
As you can see, I upgraded an older foam cannon...............................
I think what separates the MTM foam cannon is how it uses less soap solution per vehicle, without compromising foam quality. That non-MTM foam cannon above riffles through soap at a much higher rate.