I like that it's easy to use, has good reporting options as well for my management team! It can be pricey but worth every penny if you are serious about your business needs/requirements - we had used other systems before which were free or cheap however they lacked features such us P2B invoicing etc so this was an important factor when choosing our system of choice (ERPg).
We have now been able solve all problems with out previous software without needing any additional support from them at anytime since implementation either :).