These are very good stands, I use them with 10" speakers, and so far I've never seen of felt like I'm afraid they'll fall of.
They are very lightweight and easy to set up. I believe they can easily handle even heavy 15" speakers since they are rated for 50kg of centric load, so no worries with that.
Aesthetically, I thought I might not like the green ring accents, but I end up liking it, although they come with set of black rings that can be swapped easily if you don't like the green ones, so here's another good point for them.
The turning knobs have very pleasant rubbery feel, and provide good grip to tighten or un-tighten them. Also, the extending part of the pole won't be scratched after many cycles of moving them up and down inside the shaft or by the tightening mechanism, of coarse if you're being reasonable and don't force push them without undoing the knob enough. The safety lock pin has a dedicated rubber holder so it doesn't rattle and scratch the stand when folded.
Great value for money
Can't think of any
More than satisfied with the build quality of those stands, and I really doubt somebody could be disappointed with them.