Pros: Decent isolation, powerful bass and low end, overall good sound quality (with right fit)
Cons: Just don't work in my ears, occasionally muffled mids and vocals
I'll say right off the bat that this is my first pair of remotely high-end headphones, and one of my first major reviews. So try to forgive incorrect terminology or generally novice-sounding terms.
Moving on, I'd also like to note that I received an older edition of the Turbines; mine had the right-angle connector and 2 cases (both of which were suede-esque material).
On to the review....
I first listened to these right out of the box. I was impressed. Moving up from a decent pair of Creative in-ears that came with my Zen X-Fi, I found these had much higher sound quality. The packaging itself was quite nice, a high quality box with nicely organized accessories and such.
I then started a burn-in, a combination of music and pink noise. As of this writing the Turbines have a bit more than 10 hours of burn-in time.
With the right fit, the bass and low end/percussion on the Turbines is excellent. Drums are powerful and felt through my head at decent volumes, and bass is pronounced. On most songs, mids and vocals sound absolutely fine; nice, not oh-my-gosh-remarkable but good quality. Occasionally, particularly with a not so great fit, mids and vocals sound a bit muffled or suppressed. Nonetheless, the overall sound quality on the Turbines is good.
But that quality is dependent on a good fit. I have weird ears; I'll admit that. But getting a nice fit with these is.... trying. I'd say every other day I have to switch from medium tips to small tips. Different medium tips seem to be slightly different sizes. The wrong tip completely ruins these headphones. The smallest triple-flanged don't fit in my ears at all; they're horrible. The largest triple-flanged serve as q-tips for me (gross, I know, but that's how they are in my ears). The smallest and medium single tips are what work for me, but as I said I have to change which I use with some frequency. This may just be me, I know I'm weird, but it just means that my experience with the audio quality changes. And the metal body of these is heavy, which means a not-great-fitting tip makes the headphones fall out of my ears. Is this a constant issue? Not at all. Generally, I have no trouble with the fit. But I have enough trouble that it's a noticeable issue.
The cord quality is decent. Tangling isn't much of a problem, and the cases are high enough quality to help, too. I don't worry that they're going to fall apart, and if they do I feel like I could probably get them replaced.
Are the Turbines perfect? No. Are they probably as good as I was going to get in the $100-$150 range? I think so. Going up to $200 I could've gotten the Pro Coppers which may have been much better, but for what they are the Turbines are quite nice. I chose them over a pair of Audio-Technica's, and I'm overall happy with my choice.
In closing: I like the Turbines. They sound between good and very good, based on the fit I'm getting. They have decent isolation; I can't hear normal conversations around me when I'm listening. They're not entirely comfortable, they don't have the best audio quality, but they're a solid, punchy pair of IEMs with good bass.
Given that I want to mainly use these as my super-portable headphones, I'm now off to look for a mid-quality pair of on ear full sized headphones for home. For on the go or for those who want to mainly use IEMs and not spend a fortune, I'd certainly recommend the Turbines.
So I'm returning these. But it's not an issue that will affect everyone. I have slightly weird ears, and I just cannot make these fit right due to the heavy metal bodies. They hang down slightly and cause some pain and I can't get a seal I like. So I would still recommend the Turbines to someone looking for fairly nice IEMs that has absolutely no history of fit problems, as the heavy metal bodies can cause these to fall out and be uncomfortable. Call me stupid if you must; I'm getting a 100% refund.