This plugin has lots of nice features, but some incredible annoyances.
1. P3Plugin Profiler tags JetPack with 50% of my server load.
2. The WP stats take like 20 seconds to load.
3. I have 6000 spam feedbacks carefully stored by Jetpack and would need 3 hours to manually send 100 to the trash at a time, then another 3 hours to clean the trash out 100 at a time. All the while constantly overloading my HG VPS 9 server.