Seller offered these at a great price and thus a great value. At normal retail, I probably would not spend $500 on them. I’m using them to monitor live in a church and really like them for that. They are very flat which makes them closer to what the speakers sound like in the church. Isolation is good enough for what I’m doing and they are very comfortable. You really could wear these all day and be fine. Much better than most. I have the 840’s as well and prefer these to mix with but the 840’s are also fine for this but not made as well. For simple pleasure listening these would not be my first choice. They sound pretty lifeless for that at my normal listening levels. They do get better as you crank them up but for that I prefer the 840’s or others I have. So in summary, if you are mixing etc, these are a very good choice. Many headphones have stronger highs and lows than most studio monitors or other speakers are not as good to mix with as these are. If listening for pleasure though, I think there are better options.