I've been on a C4 run for 3-4 years now. Programmed my last RTI system on my way to C4 training.

Long story short, don't miss RTI.

Still has its place, would consider for commercial applications still. But honestly, once installed, no real C4 centric service calls.

RTI is solid, but as you said, going over pages of interface to make sure IT assigments get old, and system macros are a tough habit to learn.

C4 builds those macros for you. I tried Crestron, way too much for me to take on, System builder didn't make me happy, simply was too much too learn at the time.

C4 has made me happy.