We are a mid-size contract research organization and this software was a bit overkill for our team as a whole. From a project management perspective, I thought the software was spectacular. It definitely helped me organize and visualize what was happening in all of my projects. I liked the layout, interface, and ability to add as many details as I wanted (in a time dependent manner). There was a little bit of a learning curve, but not bad at all. The challenges were on the accounting/finance side and with some of our technical staff. Our accounting and finance folks found it challenging to transfer all of our client, inventory, and procedural information into Clarizen. We did not have an easy way to port information from our current system (Quickbooks) to clarizen. Technical staff pushed back on the daily requirements to accurately manage their assigned tasks. They were, in many cases, reluctant to learn a new on-line system. If you team isn't too tech savvy, roll out of this product will be a challenge.