First few times I tried it, it took a while to get past the "jiggling". (oscillation). I had a Challenger for a short time and the Conquerers ar much smoother running, so that could be part of your problem with it.
Also, if you cut your teeth on a 175 Rotary, an orbital machine will be harder for you to get used to. It's a different animal.
OP is an excellent tool that will help you be a better cleaner and make you more money. I STILL get calls from folks, on occasion who INSIST they want NO steam, they want "dry" cleaning, and there is absolutely no convincing them. I don't have to pass those jobs up, I can give them what they want. You won't find anything out there that is a better machine for pre-agitation, and if you haven't post padded an olefin or polyester job yet, you're missing out.
My opinion is that every cleaner needs to at least try for a while and give it a fair shot, before writing it off as a gimmick.
In the same way, we all need to be careful about thinking that any single method or tool is the magic bullet for every carpet.
You can throw around that you have "Mastered" something, but so what.
A true Master is one who exercises humility and realizes that there is always something new to learn, and you can learn from anyone and everyone. By contrast, someone who is arrogant is convinced that he is smarter than anyone else and already knows everything there is to know.
MIKE