Love it! When my husband hogs the PC, I can just hover the mouse to see if there's anything really important in my email. (And then kick him off it...joking)
Seriously, it's a real time saver when trying to keep up with the mail.

Muy buena, es de las mejores extenciones que he visto para los servivios de google

Works Perfect for me.

In my opinion, this is definitely the best Gmail Notifier. Everyone should use it.