Yes, the Acadia has way more room than the Tahoe. It is amazing what you can fit inside one. We traded our 2011 in which had 92k on it for the 2016 Suburban. We needed even more room to put Hunters wheel chair and running chair.
No issues with ours. Our 08 had the water pump go out at 80k but warranty covered it. Our 11 ran like a top. The only issue is the engine beats up the oil. The OLM is set to 5k oil changes. No matter how we drove it, all city or all hwy it always was at 0% at 5k miles and I would suggest changing the oil at that time. Do not go longer. Run AMSOIL OE 5w-30 and you will be fine. No sense in going with the good stuff since it doesn't make a difference. It is a DI engine so we had fuel dilution big time. Now that might have been due to our driving, mostly short trips.
If you get it you will love it. Plenty of power. You can turn off the traction control and spin the front wheels really easy.
If you do get it, change the oil, run it to 5k and pull a sample. It will tell you how the engine is doing.
Changing the spark plugs out isn't fun. You have to pull the intake off to get to the back three unless you got hands the size of a Fairy and the moves of that magical creature.
It was our first vehicle with AC seats and now I can't go without them. Hence the LTZ Burb.
If you have any questions just let me know.
Oh also the transmission is easy to change the fluid out on. 11mm drain plug I think, pull it and fill back up with what you took out and then top off according to the dipstick.
The timing chain issues seemed to be in the 07 to 10 models for the most part from what I can remember.
From oil change to oil change ours never used a drop of oil. Ran nothing but PF63 filters I got off eBay for $4 each. I was going to start running the EaO17 AMSOIL filter and change it out every other oil change but I bought 10 of the PF63's at one time to get the low cost so I never got through them all by the time we traded.