This component is very powerful and really allows you to create applications withing joomla. The fact that dat can be handled on the front-end and on the back-end depending on access rights makes it a really nice option for managing forms and tables for end-users.
It has a lot of plug-ins... This is a pro and a con at the same time. The con being that the use of plugins is sometimes confusing and not 100% stable.
The support is quite efficient.