After i snapped the KMC chain, I removed the SunRace and switched to the Shimano 12 speed Chain/Cassette (to get the full HG+ experience) and its been great. Shifting on the new shimano felt much more solid than my GX Eagle 12 of my Yeti. It just felt like each gear change was more...
Congrats! I have the same and its been a blast to ride. Only thing i'd recommend (and its probably really due to dealer assembly), Check all your pivot bolts for torque spec. I had my left crank arm fall off twice, first time cleaned and torqued, second time cleaned, loctite, torque to spec...