Overall, very positive experience. We will say this... you get out what you put in so spend the time creating a stellar brief and including strong support materials, sign up for the designer level that corresponds as closely to the level of design you are seeking, and provide feedback to the designers all along the way and during every phase of the contest - it helps to ensure you get the result you are expecting. And if you aren't getting that result, provide that feedback as well. Designers love to be inspired just as much as you want to be inspired by their designs.
Product : We ended up in a great place and actually had a few finalists that were at the top of our list. It is a good position to be in when you have a couple of great options to choose from.