I've seen these, but never purchased as we didn't get on very well with the regular chairs with this kind of leg mechanism; the chair seat just seemed to get lower and lower, till our knees were up to our chins and bums near the ground!
Might have just been bad luck though (or excess weight, perhaps? )
hi I have bought OH the large moon chair from Towsure, they are more expensive but when I tried the outwell, the front edge was apparent on the back of my legs like the padding isnt very good.
We bought 3 of these in August last year and we love them. They are very comfy and you get no drafts if you are sitting outside in the evening as the chair is kind of wrapped around you. The only down side is if you are sitting round a table to eat then they are too low, no, maybe not too low but too laid back, and you need the regular chairs. Anyway we find them much more comfy than the regular chairs. Going to a camping shop and trying one out might help you decide
I've got the large moon chair from Towsure, so far havent' managed to take it on holiday, but did test out in the garden during the summer. It was great, does take up alot of room though...oh well, never mind