Someone local has a iON metal DDR pad for sale. My wife loves DDR and currently has one of those 1" thick foam DDR pads.

Has anyone used one of these metal pads? Are they any good? Are they noisy? We live in an apartment - would this be super noisy for the neighbours?

Here is the pad that's for sale:
http://www.amazon.com/Dance-Revoluti.../dp/B000IBQLQS