Good quality, but rough and noisy.
591756
Likes: generous sizing makes these easy to fit onto bed (especially the fitted sheet). These feel like they will hold up for years.
Dislikes: these are very noisy and feel rough. Multiple washes have done nothing to soften them. Whenever these end up on our bed, we find that we wake each other as we roll over during the night.
3678215
It cleans very well but it is noisier than I expected.
4024631
From the outside, it looks like it is high quality.  But in side is a different story.  Not enough padding on the top.  It hurts my head.  And the padding is not removable.

Update (10/15/2013)

After couple of months of use I found that the wind noise is pretty bad.  For city riding, not a problem. When I go on highways for extended period of time, the whistling noise kicks in annoy the hell out of me.
4692986
The headset has a very good quality sound, rich bass, and excellent mic quality... but is not comfortable at all few minutes after beging used them my head sore, althoug the biggest dissapoint was 3.5mm terminal conector, it took just a little hard pull out of my monitor sound out to broke it down, the problem seems to be the wired it's just too thin, they definitely are not high quality build... do not buy if you are not going take extreme care of it.
1810117
Work generally well tough It is sometimes instable.  I had to buy a new sound card because otherwise it was vert noisy!
449642
Easy to install and the product works just fine.  The only problem is that it is creaky and noisy.  I tried following a few tips gleaned from other reviews to lubricate it without success.  I'll leave it up as it does its job, but would prefer something quieter.
3667099
Pros
Great quality prints
Good color
No jams
Fair price

Cons
For some reason this stuff squeals a lot.
Spooled very loose, when i tried to insert it into my extruder this stuff unspooled and flung everywhere.

Conclusion
I want to love this filament, but these cons make it too frustrating.
I will wait till quality control has stepped up before i buy again.
2119845
Makes way too much noise, but it's a good brush.
437119
It's noisy - makes a steady sound like when you pour a soda into a glass, with frequent clicks.

I would return it, but I don't want to deal with the downtime, so I guess I have to put up with the noise.
2367139
Ordered these bearings a while back. I've been using them, but they are very noisy and seem to have more play than is desired for 3d printing. I'm currently looking for some that are better quality.
4820918
Does the job but much noisier than we had hoped for.
1684143
Very good sound quality, but the noisy flat cable can be annoying. The flat cables are easier to wrap up and don't seem to tangle as easily, but any slight movement will transmit scratchy feedback to the ears. They sound great if you aren't moving, though. I ended up returning them because the cable noise made listening exhausting.
612182
From the review, I expect a high quality. It is a solid piece; however, the stitching on the skin side is very rough and bristly, leaving a red mark on the skin. Going to return it.
3269785
These are very well made, thick fabric and nicely stitched.  My only complaint is withtheir rather stiff and unsoft feel.  Even after initial washing, according to their specific directions, they are a bit rough.  Kind of like new levi's.  My hope is that they will soften with use and subsequent washings.  Micro fiber and bamboo sheets I have had were soft from the get go.  These are expensive and I expected softness.
3917257
The color was good.  The quality is not great.  It makes a very loud squealing noise when it's raised or lowered.
4867127
Ceramic material looks good however it is noisy. We hate to turn it on if our baby is sleeping since this button is hard to push and the ceramic on top makes noise.
4850238
It is made of great quality and I love that it's portable and easily sets up to my laptop. However it picks up every single background noise. Down to the thumbing of my hand on a desk. I would have to be in a soundproof room to have a clear recording. For that I might as well go to a professional studio.