We have been using Bidding Owl for our online auctions since 2015 and have had many great experiences with them. The Auctions run smoothly and the folks that work there are very nice, helpful and most importantly, competent in all aspects of setting up and running an online auction! They do a great job during the entire set-up of each auction and helping us set-up and design the website for each event. Our non-profit organization, the United States Lighthouse Society, has now had many successful auctions with them and they have all done great.
On a different note, there are two distinctive financial differences between them and other companies that we have experience with:
1. Currently they do not charge a flat annual fee just to be able to have auctions with them. We found that many other companies charge a fee simply for the ability to have an auction on their site. This is difficult for us to justify, especially when we don't know how much money an auction with make (or lose).
2. The percentage they charge is the same or less than the other companies that we have used or looked into for our online auctions.
For us, the financial reasons are enough to use Bidding Owl for our online auctions, but when you combine that with the great job they do and that they go out of their way to ensure that your auction is successful... The decision to use them for our online auctions was very easy.
We highly recommend Bidding Owl to any non-profit looking to have an auction.