It does exactly what it claims to do, and does it well. I highly recommend installing it, if you’re a Pro user (I am!).
Remember to adhere to the precautions: Backup, backup, backup!
Now here’s why I can’t use it: It requires running Microsoft Outlook. Since I use a BlackBerry device, and carry that with me all the time. I have it set to sync every hour, with the RTM servers.
If I move to MilkSync for Outlook, I lose that functionality, and the only place I can create Tasks that sync to RTM, is inside Outlook running inside that VM, running on a laptop/desktop machine. That doesn’t fit my “always on, always connected” methodology, but it might be perfect for everyone else!
I also run Linux, and the only access I’d have would be by virtualizing Windows + Outlook in that host environment.
Give it a try, and see if you like it. They love feedback, so let them know!