The retracted saddle height of the jack is only 8cm ( the lowest I have ever seen ), the maximum lift is 50.5cm, and it only weighs 29.5kg. It also has some other cool features: the release requires the handle to be both pulled back and turned making an accidental release far less likely, the handle makes it easy to move around, and the handle does not fall toward the ground in the release mode ( a spring gently returns it to the upright position ). In addition the release is very controlled dropping the car slowly. In short I hope it holds up, because I sure like using it.
The jackstands are even more impressive in my opinion though, because they use a pin instead of a rachet and have a fairly wide three point base with large round feet making them very stable. The height adjustment is between 33.3cm and 55.5cm. I can't see what could possibly go wrong with them so they at least should last a long time.