I love that Rumpus is secure and easy to use with a friendly community forum to help resolve user issues. Nothing really - it's a great product for what you need. It would be helpful if there was more documentation around how you can customize your rumpus sites. The fact that they don't have their own dedicated support service - which many companies provide- makes me wonder about their commitment to this product. We're solving the problem of keeping large libraries within our organization, butโฆ