This app allows you to view your calendar month at a glance, and you can mouse-over a day to see all the days events (they are even color coded by calendar). I believe that functionality-wise, it satisfies most users needs, and its price is hard to beat (free).
Nonetheless, I cant give it five stars ("its great") because of two very annoying items that need to be fixed:
1.- memory leak: this program must have a memory leak somewhere. To test it, open it as you log in, leave your computer on while you are logged-in for 2-3 days, and the memory consumption is above 200MB-250MB. Close it, open it again, and we are back to <60MB. Given that I dont have infinite amounts of RAM, this program actually made a problem in my workflow as it increased the swapping in my drive considerably.
If you have a lot of RAM, and/or log out every day, you wont be affected by this, but still, the Developer should be made aware of this.
2.- as you are browsing months in the future, the app will randomly refresh the calendars and bring you back to the current month. This is annoying for instance if its March, and you want to look at events in July, because it keeps bringing you back to March.
Ive use this program for quite a while, and have recommended it, but these two items were just too much for my patience, and I have since switched to Fantastical. Were they fixed, I honestly probably wouldnt have switched, as this app is otherwise great.
As a final note, I was not able to leave feedback on their Support site as they require you to log-in with a Facebook account, and I dont have one (nor am I planning on having on). How can you properly support your users if you exclude non-Facebook users? This, combined with a memory leak that has lasted several versions, leaves me with a bad impression of the programming skills and seriousness of the offered support, which is really too bad as the product has a lot of potential.