Lost a domain in my first NameWinner experience yesterday. I purposely didn't ask for a higher limit (default is $100) on my account because deep down, I knew that I didn't want to pay any more than that. Then, in the auction's final minutes of course, someone bid $110. I was maddly scrambling to find a phone number to NameWinner so I could increase my limit. I never found one and watched in horror as the auction ended and my prized domain slipped away.
So that helped.