After a weekend camping with the flex lite, it have to say that I like it....for it's intended purpose.Sitting in an REI Flexlite "field testing" it as I type. Really got it for backpacking. As much as I try to go ultralight, I have found that some sort of chair is pretty essential to an enjoyable trip (back issues) and at 1 lbs. 12 ounces, the REI is feasible. I'm 6' and 200 lbs. I don't think you'd want to be a whole lot bigger in it -- just not wide enough. It's sturdy, but not rock solid. For that we use the director type chairs with side tables we picked up from Sam's club. If you're carrying it, on a motorcycle or really pressed for space, the Flexlite seems to be the ticket especially at $50.
For travel on a motorcycle or when space is limited, it's great. On soft ground, the small feet dig in though. And with the other, larger chairs around this weekend, I found myself gravitating towards them. It beats the ground, a hard bench, or no seat by a mile. But it has it's faults.