Much better than the former version that had really lots of bugs.

But I still have sometimes been experiencing that the first login to Gmail on MailTab fails. When it fails, I have to retype my password. I place this software in "Log in items" of my iMac (OS 10.6.8). I think it is a bug due to this software and some other login items.

Ockham"s razor about MailTab Pro for Gmail - Email Client, v4.0