Anyone using Mailchimp?

Company recently suggested we use Mailchimp and basically threw it in front us and say "chew it.." Ok, we'll start chewing but I am not seeing a lot of tools to help us, for example, is there a way to easily add contacts from Outlook, I also don't see any gmail or outlook plug-ins to integrate into our desktop inbox.. It seems like a lot of hassle to manage contacts if you need to edit/remove, you need to edit separately on your contacts, then again manually in your "Audience".