Gotta admit I got just a bit obsessed with these extensions because it is not the first I try; I've got already some experience, and my girl and I like to experiment with it because they really do the job that I could never do because there's no way I would get a bigger cock, ever (maybe a penis pump, hmmm...). So using the extensions doesn't make me feel inefficient, but it adds some magic to the whole thing. The extra size is not much, but it's great; I feel it tight on my cock, and it doesn't slip; my girl feels it realistic inside her, so everyone is happy.