Used the trial for one month

Sorry guys. I wish this was a happier report - it would save me a bunch of time.
It's easy to install.

BUT
While it does show open and click through activities on the contact record in Sugar, it doesn't show the specific link they clicked on (which is pretty important when you have more than one link in your emails).

It does not synch invalid email addresses - so a bounce in CC does not show invalid in Sugar.

This system creates an additional "Constant Contact opt-out" field, meaning you will have to tell your people to not use the opt-out box that comes standard in Sugar next to the email address (you cannot hide/delete the Sugar opt-out field) or you have to tell them to continue using the standard opt-out and mass update the CC opt-out field according to the Sugar opt-out field before sending.

WARNING: When I uninstalled using the module loader it crashed Sugar for all our users (running repair doesn't help) - nothing viewing under Contacts or Leads - I called Sugar Support immediately and they got it fixed within 15 minutes.

Let me know when you come out with a new version that addresses these problems. (I actually may change email service providers to get a good plug-in if you don't hurry up!)