It's extremely slow in comparison to AOSP.  I have to [override](https://github.com/vicamo/b2g_manifest/tree/mirror/aosp_caf/master) that default manifest manually because AOSP mirror is just faster in other countries.

Besides, CAF is not the official source repository of AOSP code at all.  Why should we ever use CAF mirror in the first place?

And, how can the consistency be a problem?  Why not use AOSP in emulator-ics instead?