I like how it allows you control your DNS settings for multiple subdomains at once, even if they're in different locations - which was something we were previously limited by our previous provider's limitations of only being able see 1 domain per account (or IP). The UI could be more streamlined/intuitive but otherwise this app has been very useful as an added security layer between us hosting providers & customers who have less technical skills than ourselves! The most amazing thing about this tool is its ease of use. I mean, how can you have a problem with something so simple? It's like having a baby! It's easy to set up and configure. There are some things that could be improved such as the fact that it takes a while for the DNS changes to take effect but other than that, it's perfect. I'm using it in combination with my own DNS server at home to make everything more secure.