I purchased mine from Home Depot. It comes with a 60 day money back guarantee.
I would never think to use it on hardwood floors and I would put a throw rug down to use it so it doesn't ruin any valuable surface. I found it to be quite enjoyable. I do not lean forward or backwards. I've been using it a little at time to get my muscles used to the motion.
My board doesn't turn round as I twist. If I twist a certain way I can get it to go in circles if I want.
So, I don't get those posts. Haven't had it long enough to see any real results but, I do feel the burn in my legs when I use it.
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