I like that it can be used in conjunction with other tools such as Salesforce or Asana which are very helpful when using all of these together.
The interface could use some work but there's nothing wrong per se about how easy it was to learn! It took me less time than expected to get up & running; however once you do so you'll find yourself constantly wanting more features - even if they're not right now available through their free trial version. We've been able to automate our quoting process completely without any manual data entry required.