Things I liked:The unit is compact, easy to asemble and very easy to use. The incorporation of a standard camera tripod screw attachment is a bonus. The screen extension is also a good feature. Things I would have changed:Nothing. What others should know:Initially I had a minor problem with the electronics of the unit but this was rectified promptly by the manufacturer. The service from both Pyramid Air and Chrony was first class considering I live in New Zealand. The unit has been tested using an air rifle , a rimfire and a centrefire rifle and it performed perfectly. I would not hesitate to recommend this product to other shooters.