Rated 4 out of 5 stars

Here's what I got so far:
I manage 3 accounts with this addon:
Account #1 (Google Apps account for my domain)
Account #2 (Simple Gmail account)
Account #3 (Simple Gmail account)

Playing around with it I found this:
- I can always login with Account #1, except if I click on the "Sign out of all accounts" option. After that I have to restart Firefox;
- I can have Account #1 and #2 singed in at the same time;
- I can't have Account #1 and #3 signed in at the same time;
- I can't have Account #2 and #3 signed in at the same time, even if #1 is signed off;
- I can't have Account #3 signed in even if both #1 and #2 are signed off;
- If I sign off of any of the 3 accounts (individually), I can't sign in to any of them again until I restart Firefox;
- If I swap account #2 with #3, creating the order #1 #3 #2 in the account tab of the settings window, I can now sign in with both #1 and #3 simultaneously, but never with #2. All other conditions stated above, now applly to the new order of the accounts.

I really hope this gets fixed quickly, as this is one of my most usefull Firefox addons.

Also, MOOK version doesn't work for me, even after deactivating Buzz on all accounts (except for the Google Apps account, which doesn't have Buzz).

This review is for a previous version of the add-on (0.6).