3 flutes router bits helps to have no bouncing against the wooden cavities being routed. So it makes the cleanest work, and it is much important in my job.
After a scary tear out on the end grain of a guitar neck, I bought two bearing bits from Radian. These bits left an incredibly clean, smooth finish on the end grain, without any tear out or grabbing of the work piece. These will be the only bits I use from now on.