I know this is an old thread. I inherited a "Next" mountain bike from the previous owners of the house I bought in Hawaii. I believe Wal Mart used to sell these. I just started riding it and am working myself up to riding it from my house to Hilo and back. This is a distance of 25+ miles. So far it's been just fine. It's a 21 speed and both derailers work very well as do the brakes. I may decide to get something different later, but at 59 years old and retired I wouldn't want to spend over $500 or so. This bike is fine to get me into biking again and to see if I'm going to stick to it. I am having fun riding this bike for now and have ordered a new helmet, multi tool, water bottle cage for the handlebars, and small air pump. I don't flog the thing. I ride mostly paved streets, but regularly ride on gravel roads also.