Yeah for the longevity of the Denali, I don't see why I wouldn't last 5 years. I have a cheap MTB I bought reduced at K-Mart about 6 years ago that still rides perfectly fine.
Cig has over... what... 3000 miles on his denali already and it's still running like a champ.
There were a lot of people early on in this thread that never imagined this bike would hold up. I read the whole thread... there was everything from the handle bars snapping to the pedals breaking... and so on. It seems this bike holds up just fine. But some people just can't stand the fact that others ride (and ride well) such an inexpensive bike.
It's like they must work at a LBS or something and this threatens their lively hood or something.
I checked out the used market here. First off there's no craigslist covered city for 60 miles of my home. The nearest are Huntsville & Birmingham and I checked them and there wasn't jack on there except some NEXT or whatever they are called cheap MTB's.
The Denali I actually bought locally at Walmart (Amazon has it and other bike stores online have it). There really wasn't a better option for me without scouring the flea markets and yardsales and who knows if I'd ever find anything let alone be able to identify a good bike from a bad one.
I feel that now I could probably do a good job buying a used bike on my own. I may do that sometime in the near future as a second bike since I love road bikes

... but to start out not even knowing a dang thing about road bikes I feel the Denali was a wise purchase.
I may never see a $ out of it... but I never plan to sell it anyway.