First of all, a great big thanks to the Mixxx developers!
I waited eagerly, with an old version of Mixxx (1.08?), to get my hands on 1.11, and the return of a sorely-missed function-AutoDJ.
In short, I love it. As some have already mentioned, it can be 'broken' or fooled by the user, but with a bit of common sense, it's rock solid for me and does a great job. The only reservation I have now, compared to the previous set-up, is that it plays across the decks: deck 1 -> deck 2 -> deck 1, etc. Previously Mixxx would play all queued up songs in one deck, freeing the other one for 'previewing' the songs. As far as I can tell, so far after two sessions, putting a song in the non-playing deck, just to preview, won't work as AutoDJ pre-queues both the current and next song, and as a result thinks the next song is already loaded there, and will just play whatever's been left there. This is a bit of a problem, but if as another post suggests, we're about to have previewing directly from the palylist/library, that'll be just great.
The 'new' library is fantastic. I can now scroll through songs even with the keyboard (impossible in the previous incarantion of the library as the up or down arrow would just jump through three or four songs). Searching and filtering is a god-send, since you can't easily bring up a by-album, by -genre or by-artist list of songs, in fact it's so good, it's above and beyond what I could've hoped for.
However, the problem now is lag; when adding one song from the library/palylist/crate/browse view to the AutoDJ queue, the waveforms freeze up for a moment, luckily not the music though. Ok, no biggie, but if selecting more than a few songs, Mixxx effectively freezes up in the process of adding them to AutoDJ. If selecting a sizeable playlist-forget it, you've list Mixxx for half an hour while it does what it does to add the songs to the queue. This one's a problem.
As already mentioned, the beat analyser is foobared- it's just not doing anything.
It would be nice to have totals for the number of minutes:seconds of songs queued up in the AutoDJ, small thing I know, but makes a difference as I have to manually add the songs up to know how much I've got.
Finally, I love the play logs, letting me see what I played in the session, if someone asks what that was you played two tracks ago (as they inevitably do), and to prevent playing doubles.
Thanks, looking forward to the release version!