Pros: Decent sound
Cons: Fiddley. A smart phone app is the only way to control them. Charging via laptop USB is tricky.
TL;DR: I bought and returned a pair of Parrot Zik headphones. I liked the way they sounded. I didn't like that it's hard to charge them and that I always had to use the smartphone app to control them.
They sound better than the Nokia BT-905 headphones I've been using for years. The noise canceling is as good as or better than my Nokias.
There is an Android application that you use to set up the headphones. You can control things like the noise canceling (on/off), the size of the sound field (e.g. small room, jazz club, concert hall), and some aspects of the DSP.
They pair easily with your phone. You use the app to do that.
When you take them off, they pause the music. When you put them on again, the start the music.
They are comfortable to wear.
You can listen to them via Bluetooth or over a cable.
They seem well made. I liked the feel of the materials.
The only way to control them is with the Android application, even if you're listening to them using a cable instead of Bluetooth. That's just too fiddley for me. It's also not suitable for use on an airplane because you mustn't turn on Bluetooth in flight. At best, you set up the headphones before takeoff and hope that you don't want to change anything about them during the flight
I couldn't hear much of a difference between the various sound field and DSP options.
It was hard to charge the headphones. They don't come with their own charger. I tried two 1.0A USB chargers. Neither of them worked. I tried two differerent laptops. One of them worked. Alas, I don't own the one that worked. I asked Parrot about it and they replied: "We typically see this behavior on some Dell, HP and Apple laptops. This is because they laptops are not giving a high enough output for the headphones to interpret as a charge."
I returned the headphones because I couldn't charge them with equipment I already own, equipment that charges all of my other USB devices without fail. The fiddley nature of the controller app would have driven me to return them as well.