I've stopped using Jetpack. Too many plugins are needlessly tied into the Jetpack authentication. If the connection between our server and Jetpack drops, all our Jetpack features will be disabled during that time, and might not even come back up by the time the connection is restored, because sometimes we need to re-authenticate.
Do not appreciate this sort of lock-in. The majority of Jetpack's features should be completely independent of persistent authentication with WordPress.com.
A feature rich package with minimal complications, but with some caveats still.
- Comments appears to work badly with poor connections - Replies made while using my phone's tethered 3G connection would either fail to be nested or not posted at all.
- Publicize is nice, but still lacks some big features available in "competing" plugins. My top addition would be tweets & facebook comments integrated into the comments section.
- Custom CSS is already a default part of WordPres, I don't understand what it adds.