I've been very satisfied with my Grizzl-E.
It's inexpensive; it's simple; it can be set (and can be ordered factory-set) for any of the four most common maximum charge rates; between the fact that it has no front-panel controls and a very simple indicator light that can be read from 20+ feet away, and the fact that the plug hook is a separate piece, and the fact that the cables are relatively easy to detach for unusual installation situations (I needed to put the charging cable through a wall and change out the line cable entirely), it is very flexible in terms of placement.
Oh, and being Canadian made, and designed to tolerate outdoor installation under Canadian weather conditions, it's extremely rugged.