cm-12-20150430-UNOFFICIAL-saga + gapps-5.0.x-20150404-minimal-edition-signed + xposed-sdk21-arm-20150426
is working fine for me
cm-12-20150502-UNOFFICIAL-saga seems to have a black screen issue which
kchaisu reported, didn't test that build myself
cm-12-20150505-UNOFFICIAL-saga not tested myself
cm-12-20150507-UNOFFICIAL-saga not tested myself
cm-12-20150509-UNOFFICIAL-saga + gapps-5.0.x-20150404-minimal-edition-signed + xposed-sdk21-arm-20150430
is working fine for me
cm-12-20150512-UNOFFICIAL-saga + gapps-5.0.x-20150404-minimal-edition-signed + (xposed-sdk21-arm-20150426 / xposed-sdk21-arm-20150430) finishes booting, starts with black screen and prompt "system process is not responding and needs to be shut down" and then after 1-2 seconds reboots no matter whether you hit "wait", "ok", or do nothing. (the prompt appears in all above mentioned working builds as well but there is not reboot after hitting "wait")
cm-12-20150514 has the same issue as cm-12-20150512
@ugor84
In terms of bugs, on Lollipop, Xposed is not fully working, which results in e.g. XPrivacy not fully working (bootloops, leaking supposed-to-be-blocked information). This is not a ROM bug of course, but something to consider when switching from KitKat to Lollipop.
In terms of performance, I had been using Flinny's CM10.1/CM11 builds a while ago but they appeared laggy to me so I reverted back to SVHD 4.0.4. The CM12 5.0.2 builds appear to be running much smoother.