Consistently good food and service.
Before I moved to Vegas, the closest Sonic was 45 minutes away. Surrounded now with multiple locations within minutes of each other, I find myself returning to this location time and time again.
Service is timely and all interactions with employees there have been friendly. I've never had any issues with my orders. Beverages sometimes come with syrup dripping on the sides...but I can look past that if my order is correct and cooked properly every time.
Drive thru line appears to be long, but I always just park & order with usual order to food turn around ~5 minutes (even during peak lunch times).