Unfortunately the local LQS have workshops/classes only for their machines. I would make sure the workshop/classes included every machine and have on hand personnel that would know about it not just one specific person who works there. Don't get me wrong; its great to have someone who is proficient in 1 brand, but when that person is not there and one is told to come back another time, or I am told I don't know anything about that machine. Well that puts me off of going back to that LQS.
Its great to sell just one line of machines, but not all of us can afford the 12-15 thousand for their brand of machines. We are uniquely different as our machines are as well.