Rated 4 out of 5 stars

In my Windows machine I had to turn it off. To be frank, the entire Thunderbird 7 was slow and I had to go back to 3.15. But if TB was slow, Conversations killed it completely.
In Ubuntu it is fast as lightning and I enjoy working with the add-on very much. It saves a lot of time searching for related emails.
Very helpful add on! Thanks!

Some things that need improvement:
- Country Lookup is a very useful add-on and it doesn't work with conversations.
- Some Thunderbrowse preferences do not behave correctly (e.g. middle click doesn't open an external browser)
- sometimes attachments disappear and later re-appear
- showing the sender's email client graphically (using Display User Mail Agent add-on) is disabled and there is only textual mention of it in the details (which are closed by default).

This review is for a previous version of the add-on (2.1.1). 

Rated 2 out of 5 stars

I like the way it presents messages and threads A LOT!
But there are several problems that caused me to stop using it (until better version is released):
1. it slows the system down significantly, to a non-workable speed. Maybe it is connected to a file the add-on wanted me to erase and I didn't (no explanation was provided to what that file is).
2. It messes with some other add-ons like quick translator (doesn't work at all) and thunderbrowse (works, but ignores some of the settings).

Please keep on working - it will be a great add0on!

This review is for a previous version of the add-on (2.1.1).