I have a Vortex Viper 2-7X and love it. It is a solid scope. I have heard from others that customer service is first rate, but I have never had an issue with mine to find out. I don't know about the Monarch and the Conquest seems to be a solid scope. I have an old Leupy Vari-X III 4.5-14X 40 mm that I bought nearly twenty years ago that is still giving me good service. Again, no issue, so I have never had to test the customer service.