I've had this stand for about 3 years and I always keep my amp on it. It is solid enough for smaller amps, at about 20kg.
I used it with two amps, a 2x10" and 1x12".
The mechanism for opening and closing is pretty cool and easy to use.
However, the 2 support legs (or bars) which extend (on which the amp will sit on) were not at the perfect angle, so the amp is not using its whole base to sit correctly on these bars. To fix this, you can try to "manually adjust" them by bending a bit, or to add some foam or such at the top, which will reduce the tilt angle slightly.
I would say it's a good overall product and it definitely helps to point the amp towards your ears.
If it were lost or stolen however, I'm not so sure I would buy this model again, maybe only because of the price and ease of transportation.