PRO: I purchased these on an amazing sale ($80) and find the sound to be incredibly detailed and even the spatial dynamics are three dimensional! Bass is very responsive and quite deep for ear buds...so in terms of the quality of sound I think you would be hardpressed to find ANY better more balanced ear buds on the market. The control seems to be of a very high quality.
NEUTRAL: These fit my ears really well but I am used to the shure buds that go up and around the top of the ear which reduce the feeling of drag on the cord. Fortunately it comes with three different sizes of coverings to adapt to the user's ear. I actually am using the medium size and find it on the smallish side. So be aware of the fit. Now, that being said, once in and since i am just sitting still working, I barely feel them in.
CON: In this day and age of "heavy duty" "tangle free" cords I find it almost criminal that they cheaped out with the cable. Not only is it thin feeling very delicate but the plug seems very fragile as well. I take care of my equipment (OCD) but if you are one who chucks his earbuds in a pocket these may not be the ones for you. I can't believe that they wouldn't provide a heavier, flat, tangle free cable for such a great sounding product.
KEEP IN MIND: These ear buds come with a 2 year warranty from Sennheiser! So if you do have an issue with the cord I am certain it will be covered.
CONCLUSION: If you are more of a audiophile looking for earbuds, more than likely, you take care of your gear -- buy these! They are so crisp, clean, and balanced it really is indescribable. To hear so much detail in the music makes every album sound new to your ears (I am on an iphone 5). I would highly recommend these with the previously listed "CON" = "buyer beware."
Cheers! And happy listening!!