I received the box from Home Depot in 2 days. I was out of town so I just got to test them out today.
I was surprised with the package. It was something you would expect to see at the John Deere dealer. Very nice looking and very easy to open. The plastic was precut to open up so everything slid out nice. The "kit" includes the noise canceling headset, the wire to hook up a radio with many different attachments, and a nice case.
I put them on in the house and I got the small quite hum that most headsets produce once they are put on. The noise you get when you put your hands over your ears. I hit the switch to turn them on and it was dead silent. I could still hear people talking to me, but any and all background noise was dead silent. I will bring these in if I was working and my wife was vacuuming, I would not hear the vacuum.
So, out to the z920. I started it up with the headphones on but the noise cancel off. I was surprised as to how loud the motor was with the headset on. I revved it up to about 1/2 throttle and I could hear the engine almost as good as if they were off. It was odd. I hit the switch and the hum part of the engine went away, but I was still able to hear most of the engine, just not as loud. I hit the PTO, and I should say, the 60" 7 iron pro deck sounds like an airplane, and I hit full throttle. The deck noise was gone but I was still able to hear the motor in the background. It was the perfect balance as I believe you would be able to hear if you are bogging the motor or if something was going wrong. I turned on Pandora on my cell phone and went on my way. The music was able to be on low volume and it was clear. The music was of high quality and the lows were present.
As I mowed the lawn, I could still hear when I got a wood chip in the mower or if I hit a pinecone. Very nice IMHO since most "ting" noises were very clear. This is the first time I have ever listened to the radio while mowing lawn. I always have it the tractor and I feel spoiled. Mowing was much more relaxing to me since I like my radio time.
I don't think I have a large head, but I do have to have the headset extended all the way for it to fit me. People with big heads might have issues. I wish it took AA batteries instead of a single AAA. There is room for more batteries. I assumed that headset would muffle more noise, but it's not really needed. Also, this set is made in china.
Overall, after using them for one hour, I highly recommend them and would rate them at a 9 /10. I hope they do not eat batteries, but they are still worth it if they do.