Glad that you got your computer working again. However, depending on how tight the magnet is on the spoke, the tend to swivel around and become out of range for the sensor depending on the type of riding you do (off road, rough or bumpy streets). If the LBS did not set the sensor to where it would pick up the magnet, even when swiveled, you will need to have the sensor and magnet repositioned.

Another thing that you might want to consider is to have someone show you how change the settings in the computer or else you will have to take the computer to the bike shop for things like time change from/to daylight savings time. Also, if you change the size of your tires (height from the bead to the thread), you will need to know how to set the new tire size or the computer will be off. Don't rely on the instruction sheet for that computer. My wife has a Bontrager Trip 5W and I pretty much threw the instructions in the garbage for as much use as the were.