"Checkout was very confusing. Wouldn't take my paypal account and kept telling me to correct things multiple times. Also didn't take the coupon offer that you sent me through e-mail. On the positive side, the treadmill seems high quality. The item was back-ordered but arrived before Christmas! Very pleasant surprise. Having worked in retail, I know it's not uncommon to have to wait a month or more for back-ordered items.I'm a little worried that my dog may be too big for the mini treadmill, even though she only weighs 31 pounds. I haven't worked with her on it yet, but hope it won't be a hassle if I have to exchange for the larger size. "