I always book hardstandings Shiraz so have only used it once, in a Forestry Commision site. I cant see how they would be dangerous though because you level the van from the side needed then put down the steadies. Its not as if your lifting the van as if your parked on the side of a mountain. It would be interesting to hear others comments.
The critisms for this type of leveller are:
1 - that being on a slope the unit with the weight of the caravan can cause the unit to slide.
2 - that tyre distortion is experienced when in the lifted position.
after reading the instructions you kindly pointed me to I think that if you spread the load by using a builders plank about a metre long and about 1/3 of a meter wide together with fiamma chocks under the lifted wheel and at the other wheel should prevent any slippages. Thanks for your comments and guidance. Lutz I really cannot justify that much expenditure and being shy I would be like a shrinking violet at the attention of others.
I have just got over the comments of my neighbour when she witnessed me parking the van with the mover, she said that that mover must be the most expensive boys toys about. I said it was expensive dut not a toy as it allowed my wife and I to enjoy vanning for a few more years. The most expensive boys toy is reputably the 4x4 and you should the number of ladies who drive them and they know what they want!!! however thats another subject.