Comments would be appreciated. I am looking for one of those pucks that has the LCD read-out that displays slapshot speed in MPH (or kilometers per hour). Does anyone know where I can buy one? I've heard those pucks aren't reliable at measuring speed accurately. Anyone know if this is right? I am also looking for some sort of speedometer that will tell me my skating speed. I'm thinking that maybe joggers use devices like this that I can apply to my power skating drills. Any clues?