Wrike is our operational backbone.

My team uses Wrike all day, every day. We have hundreds of projects and tasks, and we collaborate with outside users and clients to get things done efficiently. The Wrike team has been helpful when we need them, which is not very often. I like the logical folder-system set up, and honestly there is a lot of functionality that is there that we don't need yet. It's good to know it's there. I feel like Wrike has grown with us; they keep getting better and better.
There are many PMS options out there, and many of them are good. I'm glad we've found Wrike. It is the backbone of our productivity.