Their free tier is perfect for many applications and testing of the service. Playing games with friends with an easy-to-remember hostname, easy remote access, etc.
No-Ip.com is easy to set-up (it only takes a few minutes) and all the configuration menus and options are straightforward.
There isn't currently anything that I dislike about No-ip.com
I've had no issues with No-IP.com. They're definitely with a try if you're in the market for a new dynamic dns provider.
Easy to use domain names instead of IP addresses. Previously we didn't need nice-looking domain names for some of our internal operations, but keeping a list of external IPs was also annoying.
No-IP was the perfect solution - cheap, easy to remember domain names instead of IP address without the expense or investment of needing to purchase a number of domain names for our testing environment.