I had been wanting to get a logo for my home-based business. I had been concerned about hiring a designer, paying them a lot of money, and NOT liking their design. I heard about 99designs on a radio advertisement, so I logged in to check it out. I liked what I saw, so I set up a contest for a logo.
I was very impressed with the response - I had something like 17 designers submit over 60 designs. I left a lot of feedback and was rewarded with increasingly better designs. The hard part was choosing just one designer. In the end, I chose the design that I really loved the most amongst many great ones.