I like that most things that you need are readily accessible and not buried like other web based billing systems. It's also easy to read. Good variety of reports to give you lots of information. Review collected by and hosted on G2.com.

Could use more options on things to pull on reports. For instance if you only use it for billing you can't see how many DOS were billed out for a given time period. Review collected by and hosted on G2.com.