I agree that back inflator style BCD generally have better horizontal underwater characteristics. Many people however complain that at the surface they cause forward lean (face planting) This isdue to the fact that they learned to dive with a standard jacket style BCD. The standard style can be over inflated and the dive get used to being higher out of the water. This is not the intended use of any BCD which are designed to keep your head afloat so you can breath. When properly either style BCD will accomplish this without face plant.