The lens to have if you only want to carry one.
Stays on my camera majority of the time. Good for vacations and general walk around. Not front heavy on my Canon T5i. It is nicely balance with the camera body. Can go from very wide to very long.
Full time manual focus makes it easy and fun to get your shot. No flipping the switch to manual if you want to refocus. I like to use the auto to focus quickly then refocus as I need or want. Can't do that without Full Time Manual Focus. A feature that that's hidden in most specs about lenses that is very important to know IMHO.
Autofocus is fairly quiet and fast. Combined with the full time manual, taking pictures is just more fun.
Doesn't have lens creep. When you point it down to the ground the focusing elements don't droop down.
Very good vibration control. I can take pictures at 1/5 second shutter speed. Which is necessary for handheld photography since the lens is not a "fast" lens. When pressing the shutter button halfway you can use the lens like a telescope with VC.
A must have if you want to carry light.