Worth it if you invest the time
Comprehensive take off system, that is very accurate. Absolutely love Block Cutting and the ability to show Contractors where certain roofing needs to go.
To set up correctly takes ages, and to set up correctly you need more than and entry level knowledge of computers, also if you don't have knowledge of how a long run roof goes together (off cuts flipping over and going to opposite of hip etc), well you need that knowledge, unless you're using it to just to get a Square Metre rate. In the age of instant gratification it's not instantly user friendly. If the set up could be streamlined in some way, it would go a long way... Honestly the set up is the biggest thing.