I was using Jellyfish RLS5 yesterday and AGPS and GPS was acting a bit funny. I'm using RLS6 today and haven't found a bug yet. A lot of things could happen in a few days is what I'm saying.
The new Kernel has only been out a few days too and devs are still mashing up an optimal combo with settings and stable apps (Dialer, Japanese remnant apps, settings for apps battery consumption.)
I'm not going to be hasty to state that it's "great for daily use" when battery might be <15% after a a few hours use.
Well what I'm saying is my battery's lasting 2 days on Jellyfish, so it IS stable for me to use for daily use, and works very well. KK is fast to release patches to fix issues, such as the GPS one you mention above. For me personally, JJ is great for daily use.