No, it works as well as it could.
No flopping at all, even if you jump down 5 feet onto concrete you won't feel a thing, it's spring loaded but you can easily "flip" it back up with a quick rotational snap of the weapon. It's not like those swivel bipods that swing and rattle all around everywhere, it's either up or down, no in between.
When locked up, it's solid as could be, you can pick the weapon up by the magnifier. Plus quick on and off with the ARMS throwlever, and since you don't have to zero it, you can use it on a variety of weapons.
It's MilSpec height, bolts to the 3X magnifier so you don't have to cut the rubber off, and is a very high quality mount in every respect, and clears most of the desirable BUIS. I can't imagine why anyone would want any other mount for the 3X unless they had no need to be able to rapidly select 1X or 3X as the situation required.
I haven't heard any action reports on it in Afghanistan or Iraq except for one. A soldier with one mounted on a M4 with an Eotech used it to take out (with the first shot) a semi concealed PK gunner at 250 yards after shooting a couple of other bad guys at close (20 yard) range on 1X.