I happened to buy them from Singapore before they became available here. Initially they were designed for cyclists and athletes in general. Unfortunately, they do not have an application on Google Play in Greece. I have downloaded the apk from an alternative site and it works perfectly.
The reasons that stand out are 2.
1) They are open ear, meaning they do not go inside the ear. Simply put, there is no sound isolation. This can be excellent, depending on what you want from your headset. You can hear everything around you (okay unless you turn it up very loud).
2) The way they fit around the ear is excellent.
I recommend them because of these two characteristics that are hard to find.
They are a bit pricey but worth it.

Pros:Good quality of sound while listening and making calls.
Cos: Connection issues with iPhone/ Shokz app is not available in all countries/Poor touch controls/

They don't go inside the ears and are very comfortable. If you wear them for many hours without talking, even though they are elastic, they become tiring behind the ear after a while. In noisy environments, they lack a bit. It's normal, considering that they don't go inside the ear... You always gain something, you always lose something.

On iPhone, when I call someone, they connect immediately. When someone calls me, I have to change the audio source from the headset to the headphones. I haven't figured out if it's my mistake or if it's a bug.