I volunteered to create a website for my town's 375th anniversary - wayland375.com. I looked at a lot of options for calendars. I wanted something that logged-in contributors could use and that had a polished look.
I had always used embedded Google calendars but was nervous about allowing contributors the access they would need to update it. Plus the Google Calendar UI doesn't provide a standard way of entering the event details.
I like Time.ly Event plugin because of the nice look and feel, you get quite a lot in the free version. And the Pro version has a button on the calendar for logged in contributors to easily add an event from the front end.
I like the flexibility of Calendar views available in Time.ly. When the town's anniversary year was starting, we only had a few events so we used Posterboard view instead of the calendar. It gave us a nice look to the Calendar page.
The event page layout is also very nice and professional looking. It gives all the details of the event in a well organized way.
We like the inclusion of a Google map thumbnail as an option. We also have used the Buy Tickets link. The button is 'smart' and hides if you don't enter a url.
We are on shared hosting so we minimized the number of other plugins since the event calendar is very important to us.
The developers have been very helpful and responsive.
Overall, I am very happy and the Town committee and community like the looks of the website, most of which I attribute to the Time.ly calendar.