They've had them for a while- the same one that can be found on ebay sometimes, and the same price. Basically a plane or boat esc with car software- nothing amazing, but it works well enough.
As a back up esc for $ 100-, it might not be a bad alternative....just a thought. I was looking at them as well a few minutes ago while shopping for batts. for my new CRT .5.
1. MBX-6 T8 1900KV, RX8 ON 4S
2. MBX-5T 1520, MMM ON 5S
3. MBX-5 ONROAD CONVERSION 1515, MMM ON 5S
4. MRX-3 ON ROAD CONVERSION 1512, MMM ON 6S
5. TEN T 2650 T8, MMP ON 3S