I find that odd. I've used Castle motors for 7+ years and have had nothing but good luck with them. Not saying it isn't true in your case..just odd. I've always considered them the industry standard.The ESC is excellent, the motor may run hot on 6S. It gave me issues in my Kraton. I had to run a very small pinion, motor fan and Proline Badlands to try and keep it cool. It will be best on 4S or 5S.
That's why I opted for posiden motor with the momba esc... cant wait till they arrive..Definatly a quality brand but normally a higher KV like a 2200 will run in the higher heat ranges in a heavier vehicle. Final gear ratio plays a big role in it also. At the time... I could not fit the pinion and spur I needed.... so I installed smaller tires to make it better. Funny thing is.... I didn't expect it to run very cool at all on 6S but it thermaled often off-road so I gave up on it. Insane power but ran too hot with smallest pinion and tires. That ESC is fantastic in a Kraton but there are way better motors to use for 6S. Same speeds, cooler temps, longer run times can be achieved easier.
On lower cells, it would not matter. It is a 6S rig so why not go for a better choice of 6S motor.
I have this setup in my Kraton. I love it! The motor does run a tad hot, but I installed a wild turbo windy fan on a 3d motor mount from wild turbo this evening. Haven't ran it yet tho. That being said I have abused this setup, just keep an eye on the motor/ esc temps. Good batteries will also help with esc temps as it will help keep ripple down.
Im also running a 17T pinion as my 15T went away when I sold my nero. And I have replaced my esc fan with a wild turbo 30mm fan. It should help stay cool as ot spins at a much higher rpm than stock.
I have only ever run 6s. Although cheap batteries will make a difference, not in a good way. LolYup...it's a bad ass combo but it needs to be watched closely on 6S. I ended up installing a longer motor with lower KV and geared it with a 19 or 20 tooth. It's much easier on everything and just as fast or fast enough for what the tires can handle. However...it only runs well on 6S now and it's slow on 5S.
Except the HW comes with a programming card. Possibly even more programming options...