I've tried several table/chairs of the years and we now use a 4" blow mold table and
these. They are very compact and comfortable to use and are at the right height. The only issue that we have is that if the blow mold table is on bit of a slope, things tend to go for bit of a slide. We've countered that by using piece of non-slip.
Soime friends of ours used to use the all in one table/chair contraptions. I sat at it once and immediately hated it. Too low, flimsy, cramped and loose bloody fingers folding the thing up (watched them do it).