Pros: Large digits allow for checking speed/cadence with a quick glance. Half the price of a wireless model. Only one battery to worry about. Fits on the handlebars wherever you'd like and mounts securely.
Cons: While installation is not difficult, it does take some time. Depending on the color of your bike, you may not like how the zip ties look on the frame. The screen is easily scratched. It is difficult to read the small letters that indicate what mode you are currently viewing (ie: a tiny "c" when in cadence mode). There is no average cadence function, so you can't review how you did over the duration of a ride.