I don't have the navi or the auto upgrade (these aren't too important to me since I prefer my phone GPS apps or more easily upgrade-able Garmin GPS units).
I wish I had the 360 camera system... and blind spot warning. I wonder if it's possible to get this installed now... (4sallypat any insight?)
The transmission lag issues... it's a combination of letting the car learn your driving style and getting used to it.
Once you get a feel for it, it'll be fine. It's different than almost every other car I've driven, but not in a bad way. It feels planted and solid on the road.
Get the panaroof if you can afford the option... Doesn't open, but worth every penny on sunny days.
I recently test drove the Disc Sport 4 times at 3 different dealers. They all advise that the 10,000 mile service interval cost is approximately $280. That's for oil & filter, tire rotate, full inspection & software update as needed.
Unfortunately, none of the 3 dealers had one the way I want it equipped, in the color combination I want, so I'll wait until August and order the 2017 exactly as I want it.
By the way.... No rattles in any of the 4 test drives and the alleged "turbo lag" is totally over stated...and can be mitigated by driving in Sport Mode. Honestly, in routine driving it's a non-issue in my opinion.
My only concern is the navigation/technology being less than intuitive.
Have mine for only three weeks before getting rear ended on the highway. Car is solid though as I got $7000 worth of damage to the rear end and I didn't even get jarred that much. You do have to learn to understand the lag but when you do, it accelerates really quickly and smooth. On the highway I was getting close to 25 mpg and 23 in town. My Nav worked great and really liked the traffic sign recognition. Can't wait to get mine back but the muffler is backordered and won't be in till the 21st of this month.
If lighting is important check the trim and options. Mine came with the halogen headlamps. Not a big issue, but the saleswoman talked about the "signature" daytime running lights and fog lights. I drove the car home and neither were on my Disco nor the invoice.