Its really stable and not going to collapse or anything as long as you tighten the pivot points after you find the angle you like. Only issue I found was with using the rytm the whole stand would very slightly start turning If I was finger drumming (might just need better surface grip). For the A4 with just button pushes and knob turning it works perfect. keeps me from hunching over the desk and looks nicer too.
That listing does appear to be the same thing. Can’t go wrong with that price! I’ve ordered another since the ipad doesn’t have one anymore.