I used to be a big supporter of gmail for the features it provides. I was totally addicted to the threading, and their pop+smtp support. They have some really cool (and useful) features, like the outgoing mail from smtp server will be added to the thread, popped emails will be archived instead of deleted, etc. My primary email (off dwipal.com domain) was being routed to the gmail account. However, gmail has always been plagued by realibility issues, which, even though I hoped will be resolved soon, are still there even after almost a year of usage.
1. Their pop and smtp servers go down a lot.
2. Emails get delayed, sometimes by hours.
3. I am not sure about this, but some friends claim to have sent me an email which i never received.
So i got off gmail till these things get resolved. Wonder when they will come out of "beta"!