I like that it's easy to use, you don't need any experience or training to set up your account and start using this tool. It is also very reliable when comparing addresses with other services. Sometimes there can be some slight delays between inputs but overall we've been satisfied so far. Nothing really at the moment. The only thing i would say about this service was that sometimes the results aren't 100% accurate, however they do work well once you're able to connect them correctly. Make sure before purchasing any software you check out their support section - as they have great customer reviews which should help give an idea as to how good/bad the product will be for you. We were looking into doing our own system but found this one to be more user friendly.