Well, I've got bikes with three rings, two and one. I ride all of them and they all have there place. I wouldn't ride my fixie up a 20% climb and my triple never sees use on the route along the river. It all depends on you and where you ride. If you've got the legs for big hills then go for a double. If you live in hill country and are a weekend recreational rider I'd think twice about it if it's your only ride. As I've said before, I've been on many big group rides and seen doublers off and walking towards the end of the day.