I'm no expert. I've got a set, but the scope on my rifle gives me a much better view.
I can literally aim/view my neighbors heart through their window @ around 150 yards likes it's within handgun/birdwatching range.
They can get heavy. Even the high end ones. Not something I want to pack around if weight is a factor and it is always a factor. A good Monocular from Leupold or similar company will do just fine.