This is what I have. It's been on for 5+ years. Works great on all kinds of floors. It does come loose every couple of years, and I have to scramble to find where it fell off, so, now that I say it, it'd be smart to buy two.
Cool!
I would try to replace the 3 screws with setscrews (using Lok-Tite), for a cleaner look AND the ability to tighten with an Allen wrench, instead of "finger-tight".
(Insert "Screw"/"Finger-Tight" Jokes here... Beevis).