Unstable and the drilled holes to anchor it to the ...
591509
Unstable and the drilled holes to anchor it to the wall were drilled on the wrong bars. Ended up cutting small pieces of wood to stabilize it.
2046757
The bottle mount is really unstable while mounted on the aerobars. Also the bottle cage broke mid race. I had to return the product.
1383975
This thing required several fixes to put together.  All the holes are pre-drilled, but done very poorly.  The holes on the wheels were misaligned and almost all needed to be re-drilled.  Several of the wooden pegs needed to be sanded down to fit into place.
1936389
Somewhat unstable and not what I thought it would be.  It still works though and a couple of modifications have made for a sturdier product
1079531
Be careful; it can be forced and then it doesnt hold together so well.  Dunno what they could do to make it resistant to such foolishness
3962468
Poor construction: the screw that holds it is poorly attached to the piece that holds it so it flew away
2672718
We ended up needing to cut a notch for the outlet and then also decided to anchor it to the studs on the bottom to make sure it does not accidentally fall off the wall.
2443477
As others have mentioned, the included drywall anchors are abysmal. Plan accordingly.
2085939
It is not particularly stable. I mounted mine with tape on a metal plate to prevent it from falling over. However, considering that it's a set of helping hands at the price of a magazine, it's not a bad deal. I'm happy with mine and use them frequently for hobby projects.
2311122
Linking these stakes is not as stable as I would like.
84947
Bad anchors and the mounting Holes are not aligned from bracket to bracket. I started to use one bracket to mark the hole for each mounting location ony to find that no two brackets are the same. Overall poor quality.
927809
Under tension it will not stay flush against the corner and bows outward.  Had to secure to wall in the center as well which provided its own difficult solution.
224121
There were panels that the holes were not aligned.  Some of the edges were bent.  It is more flimsy than I thought.
2407274
It is not stable, when clamping it to a motorcycle, it shakes so I need to find a way to make it more secure from shaking, the clamp is strong and solid.
1212410
Very unstable, I think not only because of the lack of screws, but also because of the chips. Even though it is fast, it often crashed in the middle of the task. Not recommended.
1001375
The concrete mounting anchors are plastic and did not securely hold the white bases. I swapped out for ss redheads.
1852576
The final extension on the top, which makes th tripod reach it's full height is wobbly. as you turn the crank and the bar extends up, it also wobbles and makes the camera angle unpredictable, especially when using telephoto lenses. If it was stable, would have assigned 5 stars