When I installed L first time on my Nexus 4 I loved it, it was epic, I had it since first day it was ported, then I bought nexus 5 and installed it ,and I noticed that kitkat has faster Ui. L has weird rule which it opens something u click after the material animation is done which makes phone look slow plus it's so annoying and on nexus 4 it was perfect because it wasn't as fast as nexus 5, weird, I think I'm going to stay on kitkat :/