It’s real good so far! A lot of creative tile work so rock formations can feel interwoven and gives the planet a very naturalistic feel. It uses one of the largest carts at 512k/256k so probably would have been incredibly expensive to produce back in the day unless it was very late in the system’s life, like Kirby which uses the same, and has way more head room than Metroid’s comparatively tiny 128k, but still impressive stuff all the same. Had to be a hell of a lot of work.
It’s a collaboration of several folks, lead by the guy who did Metroid Incursion, which I have also heard is worth a look although not as ambitious as Rogue Dawn.