I've had mine about two weeks. I really like it, and during the winter months it will sure help. It already does during rainy periods.
Any riser will do. I have mine in our basement media room with two weights inder the front wheel to level it out. Works fine. I also have a cheap mat from walmart underneath.
You will love it. Its a great product!! I also recommend a TV or sterio to fight the lack of scenery.
Enjoy!!
RD