-Never jams on me
-Pretty easy to install, I was wondering about it a first and then I read bens review.
-The lid clips onto the collar so it isn't flopping around all the time
-It is a good buy for how cheap it is.
-Was hard to install without directions, then I read another review and it was easy.
-Adds about 2 inches with just collar on then more with tube so it is easier to hit.
-Thats pretty much it.
I liked this a lot, I felt it was a good buy with the timer and all but you need to super glue the timer on or else it will fall off. It works well except fro it sticks out a little more so you are more vulnerable.