Here you can view data regarding the emails you send to your clients. All the info you see comes straight from MailChimp's API, and also includes Google Analytics. No more back-and-forth between interfaces. All the info you want is all here.
Data is broken up by Campaign (a single email) or Group Campaign (a collection of "the same" email you sent to many lists).
You have many options on how to view the data:
Browse it all in a table. Here you can sort by column, scroll, and choose a date range.
Download a CSV.
Look at a specific group campaign and its individual campaigns in separate tables.
Compare specific attributes of your choosing and visualize them in a bar chart.