I've had this for a few months now.  I'm using it to support a Hsu VTF-2 MK3 subwoofer.  Anybody who has this sub knows it`s a sub with a very large cabinet.  Originally, I had the sub half on tile floor and half on carpeting.  I`d cut a couple of pieces of carpet to put underneath as per the manufacturer`s instructions, but every time I looked at that setup, I was less than satisfied.