I was at a new dentist 2 weeks ago and noticed a mouthguard with a crazy design on his desk. It turns out he is in the BAMF dentist network. I make impulse decision and say I want one and order the Super Heavyweight. Dentist makes the impression with plaster and I got the mouthguard yesterday. Best fitting guard I ever used. Fits like a glove and I can breath and talk easily. I went for a run wearing it to get used to it. Will wear it sparring this weekend. I will say no matter what custom brand you use have your dentist do the impression. Mine did it twice to make sure he had it right. Worth the cost. Great quality and dentist says any issues just come back and he will fix for free.