Anyone Using Newer AVRs with "Event System" and Type A/B Counters?

I will have a 1614-based board in a few days, but in the meantime trying to make sense of some of the new features, as the architecture if quite different from older AVRs, like the 328. The datasheet is not particularly clear so wondering if anyone else has used one of the new chips and can save me some pain...

Regards,
Ray L.