Okay, I have both units, the Cycle Gear one and the HF one. The Cycle Gear gets bolted to my lift, where the HF gets bolted to my trailer, when I have to transport one of my bikes someplace.
The key is that they are secured, so they don't slide away from you when putting the bike on them.
The other thing I do is that I ride the bike on them, not push from the left or right, but sit on the bike and use the engine to get it on the unit. Getting it off, requires to pull back HARD! When doing that, I have the bike going and the clutch in, so if I start losing my balance, I just give it some throttle and let the clutch out so it will go back on.