Bests & Worsts Reviews from Amazon

Right out of the box, I could tell it has a higher build quality than the previous JBuds. The flat cable feels very "solid" and the buds themselves are built stronger. The J4s are much heavier than the J3s and previous earbuds; if you are looking for lightweight, J3 is the way to go. My main concern about the build of these earbuds is how long the flat cable will last, much like the Beats earbuds by Dre. I think if the flat cable near the base bends too much from being in your pocket or the like, it will sever easily. Onto audio quality. For the $30 that I shelled out, the J4s are a GREAT deal. I have only burned in for about 6 hours, but the bass is very "boomy," meaning they are strong and resonate well. I would have to disagree with one of the other reviews here; the mids don't sound actually that great for me. The mids are good, but not absolutely great; they can be muddied out by the bass sometimes. The treble is not nearly as high as the J3s, which are known for being very "bright" and having powerful treble. Overall, the sound quality is very good for the money. Comfort is very subjective, so I will not go into too much here. It can be a bit annoying when something hits the cable and the sound travels to your ears. If you wish to run or hit the gym with these earphones, these are definitely not for you. It is not as bad when music is on and I'm just sitting or lightly walking. Good earbuds, and a wonderful buy for the money. *UPDATE* Well, it's been about a month and a half since I purchased this. The right ear has blown out after light usage. I used it about an hour a day on a 30 minute ride to and from work. Did not last nearly as long as I wished they did. I'm fairly disappointed.