||I've been running this in my XR10 for a few months now (minus the included fan) and I can barely make the heat sinks get warm. I've relied on CC BECs for the past few years and they've never let me down. This is my first CC ESC and I am extremely pleased with it.
When it comes to build quality, tech support, and customer service, I can't think of anyone who equals Castle Creations. I've found tech support and customer service to be two very weak links in most RC parts manufacturers, but not at all with CC. If I have a question, they stick with me until I truly understand why they're telling me what they're telling me. They WANT their customers to be informed and, unlike most companies I've dealt with, they have never once acted annoyed that I had the audacity to use their "contact us" button to ask a question. CC always gives me a complete answer and they have never once dismissed me with some condescending answer like, "You can find the answer in one of the forums."
It is Castle Creations' solid business model and friendly help that makes me an increasingly loyal CC customer.
As far as the MM Pro goes, I'm not sure what it would take to kill it. The thing is a tank, overkill for most any RC out there, and I love that about the MM Pro. CC's Castle Link software works flawlessly every time and it's so simple to operate and make adjustments that even a living brain donor like me didn't need instructions to figure it out in just a few minutes.
For what it's worth, the solder CC uses to attach the five lead wires to the circuit board is a close cousin to granite. I hit it at 480-C and it didn't even wince. CC tech said they use a very high temp solder and some specialized irons. So much for going with lighter gauge wire.
I'd buy another MM Pro in a heartbeat.