Pros: It's easy to use and prevents double work.
Cons: Waiting to use it full time. During our overlap with E2 the benefits of Proshop became more evident. Eventually we just dropped using E2 and decided to deal with any consequences of shortening the overlap. There were none.
Comments (Benefits): Tasks that took a day in E2, take only an hour in proshop. Whether it's order entry, part creation or routing a job/part. The inventory involves COTS which has been amazing in creating BOMs for assemblies. We know at the order entry phase that we need to purchase and Proshop does all of the heavy lifting. We're grateful to spend less time managing paperwork and more time machining parts.