I feel like NBT is too much of an upgrade for e9x chassis beside the price. CIC more suitable than the NBT impo. And also TPMS has to replace with the upgrade as far as I know. I dont know what other upgrades needed but I am extremely happy with the CIC at the moment since I was using CCC for ever
(I was getting the NBT package around $1600 including touch pad + Bimmer Emulator but I really dont need it.
It is a Sunday Drive and I was okay with CCC cuz I only use for music. But I am very happy with the upgrade!