Pros:

1. This gives users a fabulous outing experience
2. The armband is quite fancy despite it being technological inclined
3. It doesn't require connection to a smart phone or use of data connection
4. It acts like a compass pointing you to where your friends are
5. It has a social feature where you can add a list of party goers
6. You can alert your friends that you need to be found

Cons:
It is expensive for an average user