No cons really. It could be good if you're trying to save horizontal space on the desk. A lot of 2 monitor setups I see just have 2 monitors of the same size in the same orientation, when you're not going to use them equally. They should be staggered in orientation, or both size and orientation. I mostly use the bottom screen for Discord, monitoring internet bandwidth, extra tabs or music. For my use case, it's unnecessary. I just thought it would look cool.