Any of those jaw clamp type stands are gonna be a bit crap, they do however offer you lots of flexibility and are simple to use for a multitude of bikes. I have the Park PRS-25 but don't use it loads as prefer the feel of the PRS-20 which allows you easy access to both sides of the bike and the handlebars don't constantly swing round and hit you in the head. It's also more portable especially in the PRS-21 super-light guise.
Any of those jaw clamp type stands are gonna be a bit crap, they do however offer you lots of flexibility and are simple to use for a multitude of bikes. I have the Park PRS-25 but don't use it loads as prefer the feel of the PRS-20 which allows you easy access to both sides of the bike and the handlebars don't constantly swing round and hit you in the head. It's also more portable especially in the PRS-21 super-light guise.
Cheap stands are crap and should be avoided.