Let's get to the OP's question - I have the Tangos - two pair. In simple answer, the work great.
I originally purchased the standard plug control units. they work great in any aircraft that uses conventional plugs. After some time, I found that instead of carrying a couple of batteries, Lightspeed came out with a modification that permits the LEMO version to charge a battery for the headset while using system power for the control module.
I jumped on that mod. Now I've the LEMO module wired into my RV-9A and it charges a battery for the headset. When necessary, simply open the charging port and remove the battery to install a fresh battery into the headset. Take the depleted battery and put it into the LEMO module for recharging.
VERY EASY and convenient.
The Bluetooth functionality nicely removes cable clutter from the cockpit. The wife loves that...
For the poster indicating they picked up noise - all handsets systems will pick up noise if the wiring isn't done properly - shielding connected to a proper ground, etc.
Overall, I will use the Tango in my RV-9A all the time. I've now got two pairs of Zulus that are gathering dust, along with my 30+ year old David Clarks. IF I need to take my headsets into someone else's airplane, I have the control modules with the plugs. I just have to remember to take the spare batteries...
As with all new technology, there will be the nay-sayers, as well as those who will eagerly adapt the new gear. I fall into the latter, when I see a benefit. The Tangos - IN MY OPINION (and I really don't care what others may think) are great for my flying needs.
Okay, I'm off the soap-box now...
OH, I forgot one point. According to Ligthspeed, the Tangos are NOT Sierras's modified to be cordless. The Noise Cancelling Function is the same as the Zulu. Compared to my Zulu 2's, there is no difference in Nose Canelling. The difference is in design and of course the fact there aren't any more cords getting in the way.
Now I'm really of the soap box!