A great way to get signed memorabilia for a discount. The bidding is easy and there are plenty of types of auctions to win.
Some things to keep in mind, 99% of the items are "custom jerseys." That means that they aren't NFL/NHL/NBA official, they are signed by the person but aren't up to the quality standards of a real jersey. This makes them cheaper for you, but also something to keep in mind when bidding. They also do a 10 minute extended bidding window (any bids within the last 10 minutes extend the auction time to 10 minutes). there is a buyers premium that they add to the price that goes to the auction house (I think it's like 15%).
Finally, hope you don't have a customer service issue and if you do, don't do it through email. I had an incorrect item sent to me and after 15 emails I still don't have a resolution. They blamed the COA company and said that it was just the wrong sticker, but I had sent them images clearly showing that the item in question had a different teams logo on it. As far as I know, they don't attribute a case number to these issues and don't assign them to a particular rep. As a result I've gotten a lot of replies from different people saying the same things whenever I send them a follow up email and often it takes a day or more to receive a reply.
Edit: I eventually had to go through the Better Business Bureau to get a resolution. Once I submitted a complaint, I had my item in a week.