i have a makergear m2 which runs a rambo. its a very nice board and in the year and a half i have had the printer and been on their forum i have never once heard someone pop a stepper driver. very few board issues actually. hundreds of people and i can count actual board issues on one hand. only real common issue is that the older 12v m2's bed heater could pull enough current to max out the power connector from the supply. i like the smoothieboard. it looks and seems like a nice piece of hardware. the real issue is that the firmware is still not there yet. its getting better as time goes on but its definitely not as mature as sailfish and marlin. those 2 are just maxed out at this point. i will give it another year then i will definitely consider it for my next printer.