I have been running a BL system in my Mini for sometime now. You don't have to worry about cleaning or comms drops etc.
Things to note though.
1. You are better off using the teflon coated 20 tooth pinion or you will go through a few mini spur gears. The standard alloy pinion does not hold up for long.
2. Due to more torque you will place more stress on the drive components.
3. Ensure you check your universals regularly.
4. Car pulls from corners quicker.
5. Tyre wear increases, however that comes back to how hard you mash the trigger.
I am still using the same pair of rides on the front that I fitted to the car in Mar of this year. Only changed when I ran at Castlehill due to different grip conditions. I thoroughly recommend the 3030 older style Ride tyres, great wear and grip.
BTW
I still get beaten by quick Sport tuned motors.
Regards,
calvin.