[HTC One X] asp2010:
I was just gonna do something like this, but my experience quite varies yours at a few points.

For quite a while, I've been thinking of switching to AOSP, but have been held back by people saying battery life was not as good as on Sense, and since mine was quite bad anyway, I refrained. But this ROM seemed to promise a lot, and some people were having great experiences with it, so I finally tried it.

tl;dr: Overall, this is definitely the worst ROM I have ever used, across any device, period.

Here are the reasons:

- Overall system lag and choppy animations. I've never been a die-hard Sense fan, but it's unacceptable for an AOSP ROM to be that much worse. Scrolling feels like I'm on my old Desire and every time a notification comes on HALO, everything just stops responding for around 3-4 seconds, and even the sounds get delayed.

- Enormous RAM usage. This is so much worse than even Sense 4 and its background app limit. I could only get 2 apps open at the same time if they were either really old or very basic.

- Graphical glitches/screen tearing. Every couple of minutes, some black stripes flash across the screen. Though they are only there for half a second, they get really annoying if you use your phone for more than a minute.

- Buggy system apps. I had to freeze a lot of apps like DSP Manager, OTA Updater etc to get rid of constant FCs, and still the System UI seems to restart randomly.

- Bugged music. Getting a notification while listening to music not only mutes the playback, but also randomly skips songs, regardless of music player.

- Incomplete settings. There seems no way to enable disable certain features, like the quick launcher in recent apps, and other settings, like some related to the clock and the notification drawer, don't do anything at all.

- Cluttered system. 139 system apps on the first boot; that seems to me a bit too much for AOSP

- Modpack apps don't work. I had to freeze them, because they were only causing FCs.

- Horrible bootanimation. It just looks like it's been done in MS Paint.

- Rush-job overall feel. This ROM just feels like it's never been properly cared about, just some features thrown in and that's it, it has no polish at all.

- Lying advertising. It certainly doesn't boot in a matter of seconds, it's actually much slower than even Sense 4+.

To those concerned about battery life, I found it exactly like Sense 5, although I was using n3o's kernel: 2-3h screen-on time, during about 18 hours off the charger.

And finally, to those who feel offended about my impressions, I remind you it's nothing but my personal experience with this ROM which may or may not be the same you would get. The reason I posted is not at all to complain or discourage the developer, whose work I do appreciate indeed, but rather because I myself would have liked to read such an opinion when I wasn't yet sure if I should switch or not.

Of course, this is by no means a warning not to try this ROM, since your experience with it may well be very different and you don't have anything to lose after all. There are still things to improve, and while, sadly, there aren't many AOSP-based alternatives for our One X, this is certainly not for everybody.

I hope you all understand the idea behind this post and it doesn't all turn into a fanboy off-topic rage. Peace. :)