I use these stands to hold up a pair of Adam A7Xs with isoAcoustics decouplers.
-The assembly process is quick and the build quality is nice.
-Metal parts feel sturdy and top/bottom plates are nicely finished.
-The height is adjustable: you have to tighten a set of 3 screws for each stand.
-There are four adjustable rubber feet bolted-in that help keeping the stand well balanced in case of uneven floors.
-The stands wiggle a bit if pushed/bumped (especially if you raise the poles a lot) but nothing to worry about too much. If that "heavy greek column" feel is mandatory for you, perhaps you won't be 100% happy.
-It's a bit tricky to match the height perfectly between the 3 poles. A spirit level of sort will come handy.