SMW is a weird case to me, maybe its because we have already come such a long way from vanilla in terms of Mario level design that the original Super Mario World just feels empty in comparison.

This is not a bad game by any means, obviously the controls are the highlight of the game and allow for a LOT of skill expression, and I always will love the more exploratory direction for Super Mario design than the more linear stage to stage progression from SMB3. The level design is also decent all throughout if only in the forgettable side for like, 1/3rd of the game's stages.

I'm not sure I'd recommend it solely on the grounds that the SMW hacking community has just outdone it in every single way already, if you want to experience what vanilla has to offer, you can literally just play anything else at this point.