How do I leave a review? November 22, 2018 13:09 Updated You can leave a review directly on our product page here. All reviews are approved if you're a verified buyer. Thank you in advance for the feedback! Related articles What are the shipping costs and options for the US? My doppel has become unresponsive after a failed firmware update How do I charge my doppel? What colors is doppel available in? What’s the difference between the straight strap and the tapered strap? Comments 0 comments Please sign in to leave a comment.