Pros-Amazingly clear sound. I've never had a better sounding pair of headphones in my life. I can't give an audiophile description of the sound quality, but to me everything seems to be in place for an open pair of headphones.Extremely comfortable. The velour, over-the-ear design is great and I've literally worn them for hours without even noticing them. On the package and in several reviews I've seen a comment on how you can even wear them with glasses on... I didn't know that that was a big deal, but I was blown away at how this pair of headphones didn't shove the frame of my glasses into my skin like every other pair I've ever worn.Sturdy construction- They're a teency bit heavy, but the construction is perfect. Right down to the little rubber tabs behind the cups and flexibility of the cups themselves, I can tell these are going to last a long time.Nice design. Aesthetically, these are really pleasing. Even the placement of the reflector cups within the phones that adds to the sound quality is ingenius.Cons-Not a lot of bass. I bought them knowing they wouldn't be bass heavy because they're of the open design. They're not exactly weak on the bass, but if you like bass, the only way you're going to get it is to put your hands on the back of the phones themselves as you listen to it. Then you just look silly and have defeated the purpose of purchasing open-designed headphones.No ambient noise reduction. Again, I bought them knowing they weren't designed to keep sound out. If I had to say how much sound they eliminate, I'd go with 0.00%. Even cranked all the way up, there was a gathering at school in the quad and I could still hear conversations around me.Sound leakage. I also knew of this before buying them. Good lord it's like you have stereo speakers on your head when you wear these, so if you want to listen to music in a library, or in line at the bank, or in your dorm room, or anywhere where other people are, you're going to get dirty looks unless you have it at a very low level. And you're going to be able to hear people talking smack about you and your obnoxious headphones because, well... refer back to the sound leakage issue. It's so weird! I was at Taco Bell, and this baby was screaming across the dining room, and I cranked these up and I could still hear it. Only now, people around me were looking at me like I was a jerk because they could hear every note of my music.FLAW OF THE CENTURY THAT I HAVEN'T READ IN ANY REVIEW-The plug-in is a quarter inch, and it comes with a gigantic quarter-to-eighth-inch adapter. This is simply retarded. The other way around (1/8" to 1/4") is always a nice feature, but this isn't the case with these headphones. When you plug into the adapter, you've got about three inches of garbage hanging out from whatever you're plugging into. So if you have an iPod in your back pocket, you might as well have a satellite sticking out. The other thing about the stupid eighth-inch adapter is that the actual gold plated plug sticks out of a really huge piece of plastic, so unless the input you're plugging into is out in the open, you can't plug in all the way. So if you have an extremely popular silicone iPod cover, for your extremely popular iPod, you're going to have to take it off before using these headphones, defeating the purpose of buying that cover. That adapter is also a hassle when plugging into my laptop. It just doesn't go in and stay in. Either it pops out, or it isn't secure enough to stay in place, and this causes sound to go in and out of the right phone while making the left one crackle and pop.The bottom line is that these aren't really for portable audio. And according to reviews I read after the fact, these headphones are pretty much designed for stereo receivers and either watching DVD's or gaming. I can't even see them for computer gaming considering they don't properly connect to the eighth inch headphone input PCs have. I would say that if you're prepared to make a few sacrifices and get some dirty looks when you take these out into public, the Pros will outweigh the Cons. And if all you're doing is plugging into a quarter inch stereo receiver to watch DVD's... you're set for life, girl... 'cause these are insanely comfortable and rugged.