Webmail. Which package do you like? Anything out there with better interface than Squirrelmail?

[Apollo at Carmel Music & Entertainment]

I have been using IMP (from http://horde.org), I have tried before 
Squirrelmail (but the interface is super ugly). Do I have any other 
options? Horde/IMP webmail is pain in the rear to configure, buggy too.

What else is out there?

Apollo