Like a knee? What kind of implants were you feeling?!!? Yes, I've felt them before. Slightly firm but still soft and pliable. If done right, they're good. Natural breasts are of course good if the girl has firm round ones but there are natural drawbacks as well. Drooping, sagging, disappearing (athletes, fitness prof., etc).
All matter of preference I suppose. Likewise, I'm not much of "boob-man" per say so my preferences are more based on form and feel than what they're actually made of. Couldn't care less otherwise. Whatever makes Lil' Demon971 happy...
Anyway, I didn't post that pic just because of her boobs but to show a hotty and an AR together and see if other people could contribute such similar photos.