What’s the best SharePoint migration tool ?

What experience do you have with SharePoint migration tools ? Which ones the best, easiest to use, best value for money ?

Reason for asking is I am considering doing a special newsletter which compares and contrasts them, but don’t have the experience with all of them… So if you have used one, let me know your thoughts and share as much as possible…

UPDATE! Since asking this there are now two articles on here that really help. Here is a fantastic SharePoint Migration Tool Comparison report put together by Alex Dove and this guide helps you select a good SharePoint Migration Tool.

We’ve also created a new category on our directory that lists virtually all of them. Best Office 365 Migration Tools.

Thanks in advance, Mark