I'm already hearing improvements
922670
The person with the low rating probably doesn't realize this program does require some effort on their part. I found the CD's filled with useful exercises and techniques for improving my speaking voice. The impact on improving my outgoing voicemail recording was worth the price alone.
4452579
I was replacing an older plantronics headset and I love the improvements - also love that I can connect it to my cell or computer.  Easy setup, nice options that allow me to choose the right piece for my headset (many are either too large or too small).  Day one but so far I love it!
3903560
I just received my 2 Air fixers today. In under 3 hours, I noticed a HUGE improvement in my house. We have been renovating my house, which has unleashed so many odd smells and things attacking my asthma and allergies. Not only do I notice a complete lack of smells now (Thank God), my chest is already feeling better when I breath in.  We had floor stripping, etching, bleach, pet dander everything! Now the only thing  I smell is my shampoo.

Thank you so so very much!!

I Bought 2, one for my bedroom, as it also makes a nice fan for me, the other the living room.
2755658
I'm so happy with this purchase. It installed and works easily. Amazing audio upgrade for the price it can't be beat.
3378919
I saw improvement in a few days.  My Lab is able to go from a sitting/laying position to a standing position with much more ease.
1741373
Even though I am using the same speakers as before, the sound quality seems more refined if that is possible. It might just be mind tricks but the sound is wonderful.
1039332
Awsome  doe bleep,cant wait to see results in the next couple of weeks!
4296469
Now I can finally change the volume on my TV.
3789949
I've have a Quiet Comfort 2, the predecessor model to the Quiet Comfort 15, for about 4 years now. I've used it almost every day, either as regular headphones for music or simply for the noise canceling while studying.

However, my one complaint is that the QC2 does not block every type of background noise, especially low frequency stuff like footsteps on the ceiling above or base coming through the wall. This is particularly distressing for me as I live in an apartment with noisy neighbors and the murmuring babble of their TV often comes through the floor.

Well, I just got the updated QC 15 model today in the hopes that the updated noise canceling technology was in fact significantly improved. And remarkably, they don't just reduce the bleed through noise from my neighbors' TVs, they COMPLETELY block any hint of such noise. I'm wearing them now as I type this in blissful quiet. This is a far better result than I could have hoped for, and to me the $300 is well worth the improvement.

So if you're wondering if there is a noticeable improvement in the noise canceling, I for one am happily convinced that there is.
2612311
Based on the fact I had a pair of the over ear headphones before I already know these are going to be good.
3321786
Considering that I've been using the earphones Apple provided for the past, oh, five or so years, I think it's safe to say that pretty much anything would have been a vast improvement. But these JBuds have been a revelation -- songs that previously sounded muted through the Apple earphones are now clear and crisp, and outside noise (like the whirring sounds of exercise machines at the gym) is pretty much blocked out. I also like how they give you three different size options. Most of the earphones that my friends have are too big for my tiny ears, and the smallest rubber thing (sorry, I don't know the correct term) fits snugly in my ears. For 10 bucks a pop, I'd definitely say I got my money's worth.

Oh, and I don't know how important it is to mention this, but I am no sound expert -- all that stuff that most people use to single out a good pair of earphones is totally lost on me. I just use my ear buds for when I'm at the gym or walking to school, and they've served me in these purposes just fine.
2676333
What a huge improvement. I can hear the pure clarity of my Yamaha receiver thru these babies. I highly recommend
4426978
now I'm getting used to it and changing settings
This is awesome
2094045
Perfect fit, and I'm seeing results already.
4039275
I'm still figuring out how it works, but I'm pleased with the sound fidelity.
2947839
I live this device , I'm happy to say my plants are already growing , and I can't wait to try them
3385706
I was going to return these when I first used them but I was patient and although I was only using an iPod, after about two hours break in time they loosened up their sound potential. Now I can hear the bass coming out and midrange is clear as well as a smoother treble. If the sound improved that much after two hours with an iPod I can only imagine how they will sound using an actual receiver with eq. Besides now I can close my eyes, play some Canned Heat and imagine I'm 13 years old again. It's like having a small time machine.