a. The headband is unpadded, but I haven't had any comfort issues at all from it.
b. The auto adjusting aspect of it is wonderful because you don't have to fiddle with the adjusters each time you go to wear them.
c. They look like they were designed in the 70's... Which, they were.
I am no professional, but I wear the head set almost daily for 2-3 hours. Considering c., and say minimum 200 times a year, that translates into around 18,000 hours. I am pleased to say that for all of them, the head set was comfortable, and provided the sound I expected, and enjoyed.
Regarding:
a. The unpadded headband is a huge advantage when it's hot. Because there is no padding, there is also no "heat storage", and the top of the head also does not get hot in hot environs.
b. Notice that the auto adjusting cans do not rotate or fold out of the way. This removes the inconvenience of fiddling with rotating or folding cans when putting them around the ears.
c. Lastly, I have one of those early 70's ear phones, for about 30 years. It stll works. Same model, except the early model has a fixed cable; it also has a bit classier looking logo plates on the sides.
I just bought a replacement, but only because I was worried that the K-240 might become a discontinued line.
As a Pro, I have noticed that the newer model needs less volume setting. I suppose that's to be expected with newer parts.
If the new head set lasts as long as the old, it may be the last I need. Probably not what AKG wants to hear, but I am happy.
UPDATE: about 1 month after above post:
I am somewhat disappointed with the cable. It's slightly too stiff, and stays a bit curly. When I take it out of my bag, it is a hassle to straighten out. I am guessing consistency of plastic type material too high and rubber like material too low. Other than that, the sound is still very good.