I have to say that this thing seems fantastic to me. Of course, after buying it, I went straight to a gas station to pump up the tires. Small guy, I loosened the tires a bit before and between pumping (in 2 steps) so that the air chamber wouldn't get jammed or whatever... At least this morning, the tires were still fully inflated. The thing is super light and if you want to save space, you can easily do this without folding it, as is the case with many models. My thinking was that the fewer joints, the more stable the whole thing is. I am convinced that it will serve well, perhaps even today.... :-)
Totally dissatisfied with this product! One of the 2 wheels deflated all the time, without even using it. After 2 returns for inflation and a new inner tube (which I had to pay for!), I give up... Lame!