I got a chance to listen to these through 3 days home audition program. I tried with pleather pad.
Sound quality: First impression smooth and detailed.
I do own a few popular headphones like Sennheiser Momentum 2.0 and V Moda M100, But I was not satisfied with their sound. They sounded harsh to my ear and congested. So I was looking to go a step up in the ladder and tried DT 1770 Pro. The first thing that hit me was smooth sound, no harshness, very easy to listen for hours and hours. It has very different characteristics to its sound. It is so clear that you can’t miss anything in your music, movies. They want you to listen to everything. If you want to listen to music in the background and do some other work, this headphone will not allow you. Once it is on, it is always on your conscious mind it can’t go to subconsciousness. Most other headphones who want you to listen to every detail will try to shout at your ear, but these are not.
It has great instrument separation. Very wide soundstage. It has very good quality, quantity bass, but I felt a little more emphasis on sub-bass can make it more enjoyable. Or I may have tried with another source with better output.
Ergonomics: The pleather pad is not so comfy. Memory foam pad can make it more comfortable.
Comparison with Campfire Audio Cascade another close back in similar price range Cascade was having a more comfy pad and Bass was extenuated but that soft sub bass that you can feel in your gut was not there in either.