My 2010 Commander w/ 3.7L V6 and QTI has been very reliable and a good vehicle for me.
My problems:
At 30k miles I got a Evaporative Emissions Code that lit the CEL. Replace the gas cap with a cheap aftermarket that didn't solve it, and spent a few months annoyed and trouble shooting trying to find the problem (it's a nuance light, especially for the minor leak code, which means the vehicle is making a tiny bit extra pollution and likely NOT even any extra pollution). Turned out, the cheap gas cap was bad out of the box, so bad on the gas cap manufacturer.
I had the evaporator leak at 50k miles, slowly and lived with it for a while till it got bad enough it had to be replaced. I put off the replacement and should have disabled the AC by disconnecting the compressor, but I didn't and accidentally activated AC mode which, since there was a leak, the AC had lost enough oil it burned up the compressor. So bad on Chrysler/Jeep for the an AC evaporator that failed too early, bad on me for putting off the repair and NOT disabling the AC to make the malfunction worse. I used a cheap aftermarket TX valve in the rear evaporator that makes noise now when running the AC on low, again that is on me and the aftermarket AC manufacturer.
At 132k miles, I had a TPMS sensor go bad. The Dealership and many Tire Shops will charge you $200-$100 to change one of these. I got a good quality aftermarket Denso replacement sensor pre-programmed to the my year/make/model of vehicle, so no special tools necessary and it only cost $35. I'm retired military and used the auto hobby shop at my local base to dismount/remount and balance the tire myself for a $4 shop fee. The TPMS light went out after 1.3 miles of driving with the new sensor (you have to drive a couple of miles before the TPMS registers new sensors).
Since I have hit 100k miles, I have suffered misfires before the normal change interval for the spark plugs. I change the plugs and that gets it running like new, but that is something to be aware of, unless its just a fluke the last 30k miles for my Commander alone, I have to change plugs a little more often than is usual. This is for the 3.7L V6 and may be different for the V8's, as well, it may be a fluke just for my vehicle for the last 30k miles. Besides spark plugs for this vehicle are cheap and can be changed in an hour, it a lot longer for the Hemi.
__________________________________________________________
Some things I've gleened from the boards:
The HEMI uses a Hydraulic Radiator Fan driven by the power steering pump. Likely this is why the Commander specifies a special hybrid power steering/hydraulic fluid only available from the dealer. A replacement fan is extremely expensive, like $650-$750, and NOT an easy job to replace. There have been some posts about them wearing out. If you're looking at the hemi, check out that fan, check the power steering fluid, the OEM fluid is clear, it may darken to look grey or black. But NOT amber or red, many aftermarket fluids are red and if you find red fluid in a Hemi's or any Commanders power steering fluid reservoir, then the previous owner likely added or replaced fluid with any old power steering fluid which is NOT durable enough to protect the Commanders fan/steering and thus the condition of the power steering and especially the extraordinarily expensive Hydraulic fan is suspect.