Consider a movie which is good while having a natural, effortless feel to it as opposed to overuse of special effects and whatnot.
There is a question looking for a kind of opposite to the word I'm looking for. The accepted answer there lists "flashy", "jazzy", and "gimmicky". I'm looking for an adjective describing a real good, definitely not boring thing which is at the same time none of those.
Added from comments:
Any kind of object which can be impressive without seeming to try very hard (or having designers who tried very hard) could be meant, I guess. Natural is not specific enough:
Berlin Syndrome is a natural thriller
that doesn't really capture the meaning I need.