Hey @paolatorrealba thank you for sharing this great product
Here is my review:

Pros:

• It provides a great convenience for those who need to use two or more phones.
• It has a nice design with slim & small size
• Automatic security alert (rings when lost or stolen)
• It also allows you to find your phone or PIECE easily with its alert system

Cons:

• Different color options would may be good