Absolutely the best position for mutual enjoyment and orgasms. My last gf & I climaxed simultaneously and she squirted down my throat, and that triggered my orgasm, which she also swallowed. She sat up while lifting herself off my face rolled off and we both burst into laughter, it was an amazing moment of mutual satisfaction.
Body size can have a lot to do with it, to be successful. You have to fit. That is why the lady on top works better. As a large guy I am always wary of being too smothering or choking, when close to orgasm.