I purchased this after reading the reviews and also because I needed a long camera flex scope. I had to travel to CT from NC to survey a trimaran that was interested in purchasing and did indeed purchase. I specifically needed to inspect the stainless chainplates that secure the mast shrouds. This was a racing rig and this securement is super critical and needs to be well inspected. Of course they were inaccessible expect in one had a camera endoscope type device, which I did. I hadn't even tested the Tesslong out before the flight but I did charge it up. I was super simple to use. The cable is indexed for proper orientation. Attach and turn it on and put it to work ! Super clear images well lit also ! I high recommend for any type of mechanical inspection. You will need a micro sd adapter card for a few dollars to view your saved photos on a computer. Plastic instrument doesn't seem to be made of high impact plastic or rubber coated plastic so I would handle it with care. The case is high impact plastic and the instrument is well protected in the case. Battery life seemed well within what I need for the days work.