I have a back inflate (Zeagle Scout) and have never felt like I was being pushed forward.I have a 34# bladder and even fully inflated have never felt "pushed forward".In a calm flat quarry and heavy surf I've never had any problem leaning back and doing a surface swim.Last year at a local treasure hunt our group of 4 divers split so 2 could go check out a spot while I and another waited at the surface.He was also wearing a back inflate.We were leisurely floating on our backs watching our buddies bubbles and I said something along the lines of "I was reading on SB the other day about back inflates pushing your face in the water,what do you think?" We both had a good chuckle. I suppose with a different rig and weight configuration it could be a problem.But I am yet to encounter or observe it.