Everything about my experience with 99designs was great. Answers to nearly all questions you may have prior to starting a contest are easy to find on the web site.
The contest process itself was pleasant, communication with the designers is simple. The amount of design submissions I received went far beyond my expectations, made it tough to choose a winner from so many great options.
I called the customer help line once and had a great conversation with a very experienced and knowledgeable person who was able to answer all my questions before I picked a winning design.
The handover process was very smooth and simple to complete. I'll gladly use again and refer others to 99designs.