It is true, when all installations are done by the same people, they tend to do a better job, as they have a lot more experience. Supposedly, control over quality of the installation, was the reason why they decided to do it all by themselves. They do have a very nice warranty, which is great.
However, like Art, I'd rather have local support.
Butlers are not problem free and from what I've heard here, compared with my experience (over twenty four years) with
CDS's, they hold up pretty much the same.
Maybe
Butlers owner are more mechanically inclined, maybe they like fixing their machine, maybe they are more marketing gullible
You got to choose your own poison.
The mechanically challenged, like yours truly, chooses good local support. Not all of us were born to be talented in so many areas of expertise to include, yet not limited to: Pig farming, nap taking, never ending silver bullet searching and the list goes on.