I like that it's easy to set up, they provide excellent support, and the pricing is very reasonable. It also has some nice features which make for an easy integration with other services. There are not many downsides, but in terms of security, you should be wary of what you're giving out to your users. The price is great, so there isn't much risk involved.
We use Zonomi as our primary DNS provider. This allows us to easily manage our own DNS records without having to rely on third-partyβ¦