Replace existing AC or add 2nd unit in the bedroom

I have a 90 Bluebird. The rear bedroom AC quit. The AC guy said the wiring and thermostat would need replacing too, as they are too obsolete for the newer ACs.
So, I put an Atwood AC in. It has a panel on it to control it, and it uses a remote. NO wiring, NO thermostat, just need the power feed.

Works great. More efficient that the oem too. That is what I would do. Nice to be able to lie in bed, and adjust the temp, turn off, etc. without getting up at 2AM!