It's been a month since I switched to Google Mail. All of my mail accounts are forwarded to my gMail account now.
Overall, I would say the experiment has been a success and I don't plan on moving back to using desktop clients (i.e. Thunderbird or Outlook).
Observations:
- I REALLY like having my address book available from everywhere and not have to sync it.
- It is a much better interface than the university's "WebMail" (squirrelMail).
- I like the gMail Notifier (mac or windows) and needed it to make gMail my default email client.
- Tagging took a little getting used to - slightly different than using folders but similar enough to not be a problem. Has more advantages than using folders - i.e. a message can be have several tags.
- Very fast "Search" capabilities.
- 2GB of FREE storage space!!!
- Tons of keyboard shortcuts.
- Good spam filter - only a few spam messages have passed through and I haven't found any good messages in my spam folder - which automatically deletes messages after 30 days.
- It's cool how it displays all the messages in a thread when a new message is delivered.
- Overall - VERY easy to use.