Infoblox DDI is a stable solution. There was one product, Advanced DNS Protection, that was recently mentioned. It is another solution from Infoblox. About five years ago, there were some stability issues, especially with the hardware version. Whether it was hardware or a virtual appliance, the hardware version was not stable. However, they have made significant improvements and resolved many hardware issues. Currently, we are only selling the DPI (Deep Packet Inspection) product. So, I haven't encountered many cases where stability became a concern as they have addressed the hardware issues. So far, based on the product we have installed for our customers, I would rate it a nine out of ten. But it also depends on the specific product implementation. Since we primarily sell the virtual solution, which integrates well with the customer's virtualization system, it provides added stability.