I bought a set of these in blue last summer, and have used them (and left them out) for the last year.
I have to admit that I don't like the look of them - the design just does not appeal - but they are excellent to use. I can carry them easily, they haven't cracked like some cheaper plastic jumps I bought have, and they don't fall down particularly easily either. Of course, a windy night will knock them down, but there is no risk of accidents while you're riding.
I will definitely be buying more sets as I can afford to.
(Written by: Hevsie)