I've had a B&W Elemnt Bolt for ~5 years. Wife has one too and she uses a wheel sensor - I just use GPS. Great for tours (unfamiliar city navigation), plays nice with Strava, RWGPS & iPhone. Good battery life & recommended. Also have Garmin. I'd recommend Garmin for wearables (watches) and Wahoo for bike computers. Both have provided good customer service when needed - Garmin especially helpful in that area. The new Wahoo Elemnt Bolt (color) looks like a winner. Both are good companies but if you're on an iPhone, Wahoo has an edge in ease of use & simplicity.