I wasn't blown away by Carsland. It's great and very photogenic (took lots of pics) but I personally found it difficult to look past ToT "towering" over the land to the west when looking toward the courthouse and Grizzly Peak when looking back. Those sorta killed the illusion for me. I understand there is nothing they can do about it but still...
The car size scale of the props in the store windows (for example) isn't to me liking either. Huge plastic looking cans of motor oil with little detail on them didn't impress me. I like the use of the props in certain places, especially in Docs portion of Flo's, but the scale is so large and plastic. I loved my caramel french toast at Flo's by the way. Highly recommended.
The personal value I give the land isn't all that high in terms what there was for me to do there. To me, since flat rides are not my thing, Carsland is an E-ticket plus multiple stores selling identical merchandise and a few places to eat. Prior to visiting, I didn't think a Cars-clone would be a good idea for WDW based on my desire to see it exclusive to DCA. After experiencing RSR's, I wouldn't mind now. That ride is very, very fun. Love the racing aspect of it.