The team behind Rio Rey is very professional, always attentive to our needs and requirements, quick responses when it comes to new requests or changes of existing solutions. Nothing at all! We have been dealing with them since 2009. I know they are not cheap but we value their professionalism and performance. It's one of my favorite companies working together so far. They solved some specific problems related to network stability as well as web application security (DNS poisoning etc.). Great customer support, as always! They're so responsive to our needs that they take time out of their day just to answer my emails or calls when I have questions about things we've done together. If there's anything else i can be doing, please let me know. Nothing yet. We are currently working on implementing the product into one of our customers' websites.