No complaints regarding my M6R. It is perfect for the intended purpose for which I bought it, which is, short range commuting, ability to wheel it a couple of hundred meters to get it to my office, folding neatly under my desk. It is also great for pootling around the park. If I wanted to hammer with a group, do centuries, climb up 10 plus degree grades out of the saddle, I use my road bikes... horses for courses.