I live in Europe (I'm from England) and we have Montana and
Kings cages so I always assumed they were two completely different brands? The Kings are a lot more expensive over here than the Montana too. They look really nice though!
And welcome to the forum
The cage/aviary you've got looks really awesome and roomy. The bigger the better
I'm sure your flock will love it. Sorry to hear that other companies had messed you around. From what I have heard, cagesbydesign are supposed to be really good? Odd!