Using the Mars 4 4,5X 384 for 2,5 years now. Good for me as I fancy a rather high base magnification. Sort of point and shoot set up. For boar only with me. It is true the Mars 4 series now are discontinued and the Mars 5 series is the new ATN standard.
Have not had any issues at all but moving into non-warranty now (1/2 yr left), which always is a bit scary. Suppose scope will end up as a back-up next year.
Pros: stable and with very long battery life
Cons: rather heavy and would wish changing color modes would be more simple