Great product. Flexible, handles workflow, and has built-in reporting and notification capabilities
Quickbase allows quick and easy control of your data structures. It provides an Excel-like capability to create calculated fields and derived data. It also makes it a snap to create reports and setup email/dashboard notifications based upon data movement.
Room for Improvement:
As with any product, you must ensure that users have the right roles in order to be able to access the appropriate areas of the product. For example, you don't want a report consumer to be able to login and change the data model. This takes time to do correctly for each application. Quickbase has a very flexible security model and allows field-level security by role.
Use this tool to handle project management and processes that require workflow. I use Quickbase as a platform rather than a product.