As you will discover with a lot of outdoor gear, it is usually a matter of personal preference. Each design has its distinct appeals and disadvantages. Traditional designs can be a little bit uncomfortable, and limit your viewing area. Due to the fact that they essentially plug your nose, those that have an easily triggered gag reflex may have a hard time with the mouthpiece. However, they don’t limit your swimming as much as the alternative, and your plugged nose reduces pressure on your ears. The full face models offer you 180 degrees of viewing, they sit more comfortable on the face, and they don’t trigger a swimmers gag reflex. The downside of these designs is that because your nose isn’t plugged, it can create pressure in your ears, and you might not be able to swim as freely as you would with a traditional model.