Instruct: Classify a given Amazon review as either positive or negative.
Query: NIce Little Bike Computer

The Sigma BC906 is a nice, inexpensive but very functional bicycle trip computer. This is the second one I've bought. The display is nice and easily readable. The unit runs forever on one battery and provides all of the basic information ( speed, distance, time) for monitoring your trip or amateur bicyclist training ride. The only problem with this unit is that it sits in a simple bayonet lock on its mounting pad. The bayonet lock makes the computer easy to remove when you have to leave your bike unattended but it also makes it easy to fall out of the mount in response to severe vibration or shocks. Lost my last one while transporting the bike on the back of my car(with computer mounted)during a 30 mile normal highway trip.Good value for the price but be sure to secure the computer in its mount else in may fall out at an inopportune time.