Glitchy with little editing functionality

I have this installed on my Macbook Air and have found it to be buggy. When I take a screenshot it has hung there, blacking out my screen, for several seconds on more than one occasion. It works good enough but not the ideal tool as it also lacks important editing functions like arrows, square or round outliners. The pencil feature allows you to circle and point things out but its messy and annoying. The editor also opens up in a web browser vs. the app which is disruptive. I am still searching for a great, well priced, screen app.

LoveBear about Lightshot Screenshot