just my point of view working on customers bikes, Ive got 4 ramps, 3 at the unit and one at home. 1 is compressed air operated, the other three are pump up which vary with the pump arms 2 have detachable arms that are long and Im forever shinning my legs on them, the other is more enclosed.
the comprsessed air one is only pumped up on one end and does wobble slightly and locks in near the top in two positions.
the three red pump ups are the cantilever type that are more solid and can be stopped at 4 or 5 pre drilled hole positions. for the red ramps, two have panels that can be removed, for rear wheel removal, the third is shorter and has a longer ramp all 3 ramps can be removed.
the 2 longer ramps have front wheel clamps to hold in place.
as a safety precaution, I have drilled holes and bolted U clamps, from car exhausts which allows holding the bikes in place with tie down straps.
as a word of warning, technique to get on centre stand is important, AS, when you put your bike on the ramp, you are standing on around 4 inches of it, and somewhere around 4 inches off the ground so balance and heave ho can be an advantage. Ive a customers Triumph Trophy 955 to work on and thats a really wide and heavy b**ger to get on its centre stand.
Ive also got a pump up motocross stand a B40 is currently sat on and thats a lot higher, 12" high and pumps up around 30" high, also got paddock stands, no good for Brits, Abba stands , also no good for Brits, then a couple of lever type cheap mx stands .
basically, stands vary from £15 to £350 ( the air one was foc from my old landlord), go for the best you can afford, it really is worth it.