I play the Sicilian and had S-M played against me often enough. Basically I know 1 game: https://www.chessgames.com/perl/chessgame?gid=1126415 and pretty much follow its idfeas until my memory deviates or white deviates. Then I play it like a Schevennigen [a pawn up, playing Qb8 rather than Qc7 and focusing on 'prevent e5!']. So far, I've been fortunate and that has been enough to win every game in it. I can say that in those games white had more fun: defending is a chore compared to attacking but you gotta do what the position demands.
As white I did experiment with it for a while but always found that I wanted my knight on d4 not f3 to help attack. So I dropped SM for the standard open Sicilian.
I think S-M is an OK way for white to have fun and narrow the openings to learn. But it isnt the path I've picked. -Bill
sicilian defense closed or smith morra gambit