I bought these headphones from Best Buy just over a week ago. I was looking for something that would produce decent sound without getting into the higher end, $200, headphones. My overall thoughts are that these are a great purchase for under $150.
I will say, you're not going to get a big bass kick from these. If you're looking for a lot of heavy bass, then these are not the headphones for you. You will be disappointed by the bass if that is what you want. However, if you're looking for more of a genuine, crisp sound without spending over $150, then these are what I recommend.
They have good battery life. I have used them all day and did not get any drop in performance from low battery, nor did I ever run out.
You can tell that these are built with the Sennhesier quality, but they are still light weight. I personally think these have a better build quality than most Beats, or Sony headphones.
If you're listening on a computer, these things can get LOUD. I have noticed however, that they are not as loud when used with a phone, but that was expected.
The ability for both Bluetooth or corded experience is a must in over-the-ear headphones now, and Sennhesier delivers on that.
The controls on these headphones are great. I come from most of my experience with controls being on in-ear headphones, so it was awesome to have an upgrade in control quality.
Phone calls on the HD 4.40 are actually pretty great. I spent some time on the phone with some people, and it felt like they were in the room with me. The general consensus from the other side of the call was that the audio was fine.
I think that they're comfortable, and I have big ears. I have such big ears that they don't quite fit over my entire ear, but they mostly do, and I still found them comfortable. I was able to wear them hours on end.
The Bluetooth, while good quality with no lag, lacks volume. That's pretty typical with headphones though.
They are not noise canceling. This came as a suprise to me, because I assumed that any over-the-ear headphone over $100 should be noise canceling. These are not. I was pretty disappointed when I could still hear the meat-head at the gym grunting away, but I should have read the box first. Maybe it's my fault for not checking, but noise canceling should be a given at this price.
Lack of bass. They're not hard hitters, which usually doesn't bother me, but it's lacking enough that I have to mention it.
I bought these headphones for the purpose of going to the gym. With that said, they do the job and they don't break the bank doing it. I found their long battery life, comfort, and build quality to be worth the $150.00. I would recommend buying them if you're looking for an economy over-the-ear headphone.
I will say however, that the carrying bag that comes with the headphones is too big. Headphones are more secure in a tighter bag, so I replaced mine. I would still have no worries about throwing these in a backpack without the carrying bag, which I did one day. They lived.