If you want we can meet up for lunch, etc. and I'll ride something not Japanese (ie. Monster) and you can check them out. I am very biased, I love Speedymoto stuff and Christian in their sales dept. has been great. Get used to ordering what you want only to have it backordered... it is probably because there stuff kicks butt and they can't keep up with the stock.
I have them on my SBKs too, the under the bodywork type. Just a tip, if you get a set for the 620 put a hydraulic/manual lift under the motor because when you drive out the stock motor mount bolt with the Speedymoto threaded motor mount bolt (that the sliders thread on to) the motor slips down a few milimeters and the lift will hold the motor in place. Otherwise, when it slips down a nano bit you cannot drive the replacement threaded motor mount bolt through. Yes, I found out the hard way. The lift/jack made it a job for a six year old.
Oh, by the way, all the newer Speedymoto sliders seem to be the "mushroom" style. The older ones are standard "straight" style sliders and the ones I have look like mushrooms... if you know what I mean.