I don't know what carrier you're on, but there's a "safe upgrade" to LP 5.1.1 for Verizon Note 4's, (SM-910V), where you can try LP, and if you don't like it, you can Odin back to Kitkat. Developer
hsbadr has posted
THIS on XDA forum. (Somehow, I knew he was going to tackle this, and hopefully he'll also do one for Marshmallow). If you plan to try it, please read the entire post before doing so. If you have questions, ask them in that thread before proceeding. I'm just posting info here for people who are still on Kitkat, but want to try LP. I take no responsibility if you mess up your phone!
NOTE: This safe upgrade only applies to Verizon Note 4, SM-910V. Do not attempt this if you're on a different carrier.
I'm on Verizon myself, and while I won't flash LP, I still like that I have options!