I will rate it 5 for operativity. I had a problem, maybe a common one, but I don’t know for sure. LuсkySсаn didn’t see my main camera, so I could scan completely nothing. It happened to be an urgent issue, so I had no time to wait. And truly speaking, I got 4 similar scanners, including this one, to solve it. But none of them detected my camera. Oh, God, what a horrible time it was. So, I send the same letter to each support! And only this one answered me quickly and really helped! Comprehensive staff, thanks a lot!!! As the result, I deleted those 3 scanners and left only this one. I think, it is the most reliable. If something happens, I will get an advice and help immediately. I am absolutely sure! Maybe it wasn’t just a lucky day for those 3 apps, but it was important to me to solve everything in time. Enormous thank you for the help - I will definitely recommend LuсkySсаn !