They're very handy GP. and pretty cheap thing.
but yeah, depends if you would actually use it or not.
I find mine pretty good as i can use it for the rally weekends and easy set up for the short weekend fishing camp.
The only downside i can see is, once you set it up you can't use your car, can't take off to look for firewood or go in to town for beer, but actually it only takes 5 minutes to pack up so if you really want beers it's not soo hard.
my dodgy blog www.shackers.net