This looked like a great deal. One of the best project management UI/UX I've seen on Appsumo.

I got tier 1 to give it a try but there are no custom fields.
Without that it's limiting to build effective projects.

One must is the ability to estimate how long a task or subtask is going to take. This is only possible in their pro plan. Here's their response.

"Time estimations on tasks are a part of the GetPaid bundle and it's available only for our users on Pro plan. Here's the list of features that are available for AppSumo plans: https://appsumo.com/activecollab/"

If you are looking for a great tool to manage your projects and don't need much customization or add additional info to the task then def give this a try.

For the project planning geeks, this LTD is not functional enough...