CyanogenMod snapshots provide the most stable experience you can expect from the custom ROM, and now the latest batch is rolling out to devices. This time around you're getting the November security updates that Google released in AOSP earlier this month. Your device will still run Lollipop. Marshmallow won't appear until CyanogenMod 13.
New builds are already up for many devices, including a number of affordable Galaxy phones, Moto E/G/X, various DROIDs, both Wi-Fi Nexus 7s, HTC One M7/M8, the Yureka YU, and many others.
Snapshots pop up every month or so and should offer a more predictable experience than what you may get from nightly builds. Flash this version of CyanogenMod if you want the benefits of a custom ROM with fewer of the downsides.
- CyanogenMod Snapshot Downloads