I have had great experience with castle and their CS other then the current issues... I'll just resort back to my old tried and true Ice lite 100. Thousands and thousands of flights with them. I have used ZTW products in the past but I don't care for the short wires (I know I could lengthen them but don't want to mess with that) and I love the logging feature of the Castle. I figure so much about my setup and max out the performance, especially my 12s setups, based on the numbers from the logger.
I'd had a few issues with the larger ZTW products being not long enough in the cables and always too unsure about making them longer etc.
Never had any faults with the CC ICE products, and I find the ICE lite products really great once I found the best firmware version to deliver.
The Lite 100 is so compact and light, makes the big green brick of the ICE 100A I have in my 60" edge seem way over sized.
I run the ICE lite 100A in my 64" MXS as well, on the EF 500kV II motor on Xoar 16x7 and its wicked. That's how I figured the firmware updates were crap. I had timing issues on the MXS on the 16x7 prop. If I went from low throttle to full throttle very quickly the esc would struggle with the timing. Did some forum research and learned about the crap CC updates they were doing to try and fix the problems with the EDGE ESC's etc.
Very happy with CC ICE esc's over all, never over heated and definitely heaps of performance.