I got an envelope in the mail from Teslong just the other day. It contained a new 90-degree mirror and a letter of explanation, saying that the original ones seem to have fallen apart in some instances. The letter went on to express the merchant's desire to make sure buyers are satisfied, and warnings about rolling the cable up too tight, leading to breakage.
All in all, I am impressed with the quality of the device and the proactive attitude of the merchant. I'd recommend the thing to anyone wanting to see the condition of a rifle, shotgun, or handgun bore.
For 50 bucks, you cannot go wrong with it.
