What I like most is the rubber bottom. It actually keeps the holder secure on the counter when pulling off a sheet instead of sliding around. The side bar is useful too because it keeps the roll in place and stops it from unraveling. Feels sturdy and has enough weight for everyday use. Assembly was really easy and came with two extra screws.
The only downside I found is with the really large, thick paper towel rolls. They fit, but they're pretty tight and don't spin as freely until you've used some of the roll.
Overall, it's simple, sturdy, stays put, and does what it's supposed to do. Can't really ask for much more from a paper towel holder.