At a Glance

No-IP.com was founded in 1999, and was originally intended to provide customers with free dynamic DNS and web-redirection. Today they have many paid and free services to offer. (Source)

DNS

Their Managed DNS service comes in four different packages. They've got "No-IP Free" which is their free DNS service - you can map your dynamic IP address to a subdomain you create with them, like yourname.no-ip.com. "No-IP Squared" is their backup DNS service. Then they have two paid DNS services: "No-IP Enhanced", which still makes you use one of their subdomains, but allows you to use up to 20 of them; and "No-IP Plus" which allows you to use your own domain name. (Source)

Network

No-IP is a non-anycast DNS provider. They do have several different locations, in the US and Europe, to help increase redundnacy. (Source)

Other Features

In addition to their domain registration and email services, No-IP offers system monitoring and Failover service. (Source)

Pricing

Their "No-IP Free" service is, obviously, free. Their other DNS packages range from $9.95 per year to $24.95 per year. The system monitoring service is $99.95 per year, and the monitoring with Failover is $149.95 per year. (Source)

Support

No-IP has a support section on their website with tutorials, FAQs and tools, as well as a web ticketing system. (Source)