Very robust sight. Easy to switch on and change between sight options (circle dot , circle and just dot). Very clear screen and easy brightness settings. Switching off is fiddly. You have to press both + and - buttons at the same time. Doesn’t cut it with my fat fingers so I made a little two prong tool.
Beware ! This sight does not come with any mount so you need to ensure you source one at the same time. I needed one to fit a picatinny rail and it was difficult to get one in the UK although easier as it has RMR footprint. This model has green illumination which I find better than red as I suffer from astigmatism and get flaring (reduced when I wear my glasses). I am happy with quality, price and service and versatility of multiple screen choices especially as I can change screen easily in 3 seconds.