I have one of these, too (just replied to the 'tumbler pack' thread).
The stand works very well for my two single-stage presses mounted side-by-side for pistol calibers (9mm and .45). It is just the right size to make it easy to move around the house if you deprime in front of the TV and want to load somewhere else. It's sturdy enough for small single-stage, but I wouldn't try to mount a Dillon XL650 with case feeder and catch bins on it, if I were you!
For the price and convenience, I'm happy with the purchase. You could probably fill the base with concrete or something, after reinforcing the plastic, but IMO, that detracts from the utility of a lightweight, portable bench. I load mine down with the bulk box of bullets that I'm currently loading, and it's plenty stationary for dual single-stage use. Better yet, butt it up against your coffee table or a wall, and you have much more stability for larger calibers or long cases. HTH,