It is easely to install, very straight to be configured and you can simply change the layout of the most things.
Location management is a snap, even with google maps integration.
One can export to iCal easily and connect your outlook calendar with a free plugin. Mozilla thunderbird/sunbird connects by build in features.
It has, for me, the best implemented RSVP an Reminder management and function the way I expect.
JEvents relies on a club model for support, but the money is worth to spend, at least to ensure that the coder can spend his time for enrichments and support. :-)
Any Question I placed has been responded by the team and/or leads to a fixing/enhancement in time.