Pros Easy-To-Use, Usual Good Google Design, Web 2.0 (YAY)
Cons Creating recurring events can get buggy, Uses GMail's yucky 'invite' system
Summary After hearing of Google Calendar Beta, I had to check it out myself. I found that it was just as easy-to-use as other Web 2.0 apps but with a better design. And, it's actually very fun to use. I've spent hours tinkering with it and configuring my calendar.
Plus, you can use reminders to make sure that your on-time for events or meeting your deadline. The really interesting part is the ability to view your friends calendars and syncing them with theres. You can also invite people to events. G-Calendar will do it for you. Just type in the e-mails of the people you want to invite, click send, and it will send an invitation. Your friends will receive an e-mail in the inbox and be able to confirm they will be there, etc.
Overall, this is really something to check out. I have a few problems. Sometimes, when configuring recurring events, the program gets buggy giving you an 'Error' message. Also, Google accounts (Gmail) are still in Beta so you'll have to get a friend to invite you, for now. Great product!
Pros Connects well with GMail
Cons Doesn't work with Outlook or IE7
Summary In my opinion, it is a good start, but is far from being any real competetion with other calendaring software. It works okay with GMail, but GMail and Google Calendar are not a good replacement for Outlook or Thunderbird with Lightning.
Pros Free but not a fan of web based calendars or Web Based E-Mail
Cons Privacy-Somebody will always have access to Web Based Items
Summary Get the Palm Desktop, Don't even have to use a Palm. It's powerful, simple, and easy to use.
Pros So many views, and each is very customizable. The labels provide for easy organization, and it has significantly reduced my own stress: I always have access to it, and never need to worry about losing a phone, laptop, or getting a virus.
Cons The only con is not being able to have a theme, but that doesn't really matter.
Summary Importing is crucial for a transfer, and Google Calendar has this covered. Each of the views is great for different circumstances: if you merely want to remember birthdays, month view is most useful, but if you have daily appointments, the week view is best. Either way, you'll never forget anything again with the reminders in the form of pop-ups and/or emails that are very customizable.
Pros Simple, fast, easy to schedule events
Cons No synching with Microsoft Outlook
Summary I love Google calendar. My work schedule can be viewed by wife or anyone else that I make a trusted user. You can give your trusted users the ability to edit or just view events. The ability to use multiple color coded calendars makes the layout easy to use and easy on the eyes.