This auction site often fails to recognize auction numbers, thus I cannot use the credits I bought from them to make my bids. Also it will often give a generic "could not submit bid" when it fails to put a successful bid in - with no explanation. If you really need to bid on something and can't tolerate failure, DON'T use stealthbid. I wouldn't complain in a forum, but they never answer my emails asking for an explanation and I don't see any way to get a refund.