Well, I think that it's said that any "connector" is a point of resistance but I use bullet connectors on all my planes, heli's, and now my mini quad. In the end, I imagine it's all about "personal preference". I put 2mm bullet connectors on my quad because if I have a motor go out, I can replace it rather easily. I have spare esc's, spare motors, spare screws, spare props. So...if something were to happen, I should be able to replace the motor with ease...even at the field.