With the exception of the few idiotic, Trek hating trolls in here, I have heard nothing at all negative about that bike. It is about the same level of bike as my LeMond Tourmalet...the component package is the same but the geometry is very different. I love my LeMond and would imagine that if I had the Trek I would like that very much as well. Go for it. I am sure your son will love it.
Cheers,
Brian
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“A good teacher protects his pupils from his own influence. ”
― Bruce Lee