Glad I Bought the Corded One, but Now I Have to Shell Out More Money for the Coarser Grit Rollers
I just received this today, and was so excited, I tried it out right away.  While I love it, the reason for the 4 star rating is because I used this thing on one foot for probably over 20 minutes and could still do more.  I think it's funny they say not to use it in one spot for more than 2-3 minutes.  My feet aren't even as bad as they usually are because I have been using a heavy moisturizer and socks every night.  This should come with a coarser grit roller, and I am frustrated that after spending almost $70 I have to shell out another 10-15 for coarser rollers.  I think once I get those it will be a 5 star product.  I am SO glad I spent the extra money for the corded one, because as long as I had to do one foot today, I'd be going through batteries left and right.
Rating: 4 stars