I am considering a used 2017 ATOM Lynx 4.8 27.5 Pro. The bike appears to be in excellent condition with just a couple hundred miles. How do these bikes compare to specialized for quality? Seems like the components are very similar and use similar motors. The bike is a fraction of the cost of a new specialized. We don't have any local dealers with these bikes so can't find any first hand knowledge. Thanks for your help.