Alex, you read H Man's posting one way, I read it in another. It's just goes to show that words on a page can sometimes mean different things to different people.
I also don't think a product's profitability can be taken in isolation. I bought an SLX and other bits based solely on the q loq system. Although, with hindsight, had I known how well made and thought out the slx is, I would have bought it regardless.
H Man's terminator squeegee - each Friday I clean 23 shops which is a serious amount of work as although some are quick and simple, others are a lot more than just a few windows. By the end of the day, both my hands ache like hell due to the stupid design of the squeegee handle.
I also care to bet there are still a lot of trad window cleaners who have tightness, to one degree or another, in the tendons in their hands which is a potential problem for the future.