I registered way back, and subscribed to two mailing lists to try it out. That exposed a major flaw to me: Conversation views are in reverse time order. Which is <i>kinda</i> okay if you're talking to an actual person and might just want to look up what you previously said, basically an extended version of (goshawful) top-quoting. It does break apart if you're trying to get into a new mailing list conversation where you have to read through 10 posts.<p>If it had an option of reversing that, it wouldn't actually be that bad. Not as good as gmail, but better than all the desktop-clones like gmx.com or yahoo.