I liked their easy implementation of creating an online ticketing platform for our conference in less than 30 minutes from start till end! They were able create custom fields that allowed us to have very specific requirements without having many extra options available otherwise (which was nice).
Their customer service team could not be better - they quickly addressed any issue as it came up with great solutions. If you don't need all bells & whistles now but want something simple this would definitely work well enough right out off box. We are using them so we can easily manage tickets both offline and via mobile device/tablet apps when people register remotely.