I have had my playbook for about 5 months and I cannot stop using it. I take it to work with me mon thru fri for my personal music player and it works great for that. The PB speakers kick arse on the ipad sad rear facing speaker. I loaded up about 30gb of music and I have my choice of music all work day long, no more boring radio. Every night before bed I use PB for checking crackberry, facebook, tsn and many other things. I love this playbook and look forward what os 2.0 has in store.
I also have got 3 of my coworkers (and 1 spouse) using playbooks also plus my wife has one too.