I have the Howard Leights as well. I double them up with foam earplugs when I'm at the range, and I use them by themselves when hunting. They are easy to use, they are mostly comfortable, and they work fairly well. I use them because they don't get in the way while shooting a rifle. Battery life is 20-30 hours in my experience.
My bigger earmuffs work better and are more comfortable, but they don't allow for cheek weld. If you want a pair primarily for handguns or mowing the grass there are probably better options than the Howard Leights. I have an excellent pair of Winchester muffs that were $20 or so at Walmart, but they aren't electronic. They are my first choice when a rifle isn't involved in the day's activities.