I contracted with a shipper who ultimately couldn't ship to us within our time frame. Because it was my first use of your service, I did not know how to cancel out the bid so I could go with another bidder, who actually could get the item to me sooner than I needed it, I ended up losing both of my backup bidders and lost more than a weeks time by the time I figured it out. Aside from that, I had an easy time setting it up and using your site, and the shipper I did use was fantastic. He delivered a bit earlier than originally anticpated, which worked perfect for us.