well, honestly, I have been with 15.06 beta and so far haven't run into problems. And 9.20 isn't beta lol, and take in account that the software has been on hold for a long time, now back on track.
I have never seen this project in any state other than BETA! Seems like the developer isn't confident of his software to run as a final so he keeps it in beta eternally.
The latest 7-Zip can extract WIM content and is able to recreate junction, hard links, symbolic links, etc... I think that we can "extract" a WIM and boot on it without any problem, I will test right now.
@J-Lawrence If you don't want to contribute something productive in this thread, then fine. But please don't post any 'BETA' nonsense here.
there is also a 7zip fork called easy 7zip its a bit more userfriendly you can get it from e7z(dot)org
Current beta is good, as usual. .7z format rocks as does the software, which each 'beta' could count as a final release, as they are pretty stable as these are (no problems handling anything).