I've always had the impression that it was the artistry in the paintwork
I've seen that car in person a few times over the years, pretty sure I've mentioned that before. The detail in the paint work is crazy, but the lowrider crowd is known for some crazy paint work, some good, some bad, some insanely detailed. Gypse Rose has been painted on a few times, and I think they claim the car has something like 25 layers on it. I'm thinking at least a dozen are clear.
"Gypse Rose" is actually the second car bearing this name, built by the same guy. IIRC, he built the first one ('63 Impala) and painted it pink with some roses. I think he said this was done because his mother or girlfriend/wife liked roses. A local (LA area) gang or rival car club had issue with it and destroyed the car. The owner came back with the '64 and created the current Gypse Rose with a ton of flowers. It won some big lowrider show and made history.
I hate the interior, but I really don't mind the exterior.