The APM RC has been in the wild for a few weeks now, and we'd love to get your feedback. A handful of customers got early access, and we gave access to all of the ALX customers earlier this week. If I notified you directly, or you're an ALX customer, you should have the 4.0 RC bits waiting in your portal. If you're the least bit nervous about installing the RC, don't be. Release Candidates are fully supported production builds. In addition, Development and Product Management are paying close attention to any issues or feedback you may have.
If you're interested in installing the RC and want to know what's in it, check out the What We're Working On post for APM If you're curious as to what we're working on.... One last thing; if you install the RC, please post any feedback you have in the RC forum here.
Looking forward to your feedback!