I have only had for a day. But I compared with Toyota sequoia and the deal breaker was onstar. Unlocking is just a phone call away. Other than luxury and comfort sequoia has youkon xl denali beat. To get what you get in the sequoia you would have to buy a Cadillac for about 20,000.00 more and they're still lacking. So GM if Toyota comes out with satellite unlock doors, see ya unless you do big improvement to inside comfort.
I buy new cars fairly often (every 1-2 yrs) and I've been flipping back and forth between SUV's and Minivans for about 7 yrs now. It's because I can't get all the features I love in one or the other. As far as this SUV goes it's my usual love/hate relationship. I've had this vehicle for about 4 months now and highly doubt I'll keep it past 6 - 9 months bc I just hate big SUV's. If you're a big SUV or truck person I think it's probably fantastic. I prefer more of a mid-size SUV or Minivan height myself. Yes, minivans are super goober and I swore I wouldn't be caught dead driving one ever. Four kids later and the practicality of minivans just turns me on!
This is by far one of the best vehicles I have owned. Traded in a 2010 Mercedes E350, loved that car but it does not even compare to the Denali. We looked at Suburban and they are beautiful as well but wanted a little more. Drove a Escalade ESV and loved it but just cannot see where there is a need for a extra $10-12k. So we went with the Denali and haven't looked back.