I made a discovery.Bought one and assembled it today.
Making sense of the limited instructions was fun.
Bike gets up onto it easily.
However once on you are supposed to lift a roller piece front and rear. Getting the rear on up so the dolly can be moved is a bit of a struggle. I lifted it and then used a rubber mallet to knock it all the way. Had to take left bag off to do this.
Once done it does roll about the garage pretty well.
I wouldn't like to put any heavier a bike on it. Yiou do have to use a bit of muscle to get it moving.
Lifting the bike to vertical prior to riding off it caused some alarm. With fore and aft rollers down to stop the dolly moving the thing did scoot sideways as I exerted force on the bike to lift it vertical off the side stand.
Lift the rear roller arm whilst standing at the rear of the bike. NOT THE SIDE. From the rear it pops up easily.