Form is in the eye of the beholder. Function is engineering.
I have several pipes I would call perfect in form and function but you may disagree because your tastes may differ from mine regarding form. Achieving perfect function is simply math.
I have an Eltang basic and an Eltang "Deluxe" model (Arne- something). Both are okay but I agree with others on here who say the walls are thin. They work okay with Burley blends but a straight Virginia will heat them up pretty well.
Of all my higher end pipes, Eltang are my least favorite.