Is the Smith-Morra gambit still worth playing at a ~1600 level? I've been playing the Smith-Morra Gambit (e4 c5 d4 cxd4 c3) against the Sicilian defense for about 2 years. I have a tournament coming up in 3 days and I am beginning to doubt if the Smith-Morra would suffice. I like attacks and do not enjoy slow maneuvering play (which is why I do not play queen's pawn). Is there any reason I should change my response to the Sicilian? It seems like 3 days is not enough time to learn the thousands of variations in the Sicilian. And even I understand good play by black means that I am down a pawn for good.

FYI, I have an FIDE rating of 1398 and it seems to me that my opponents will be rated average of 1600.
The gambit is perfect for amateurs, the gambit is tricky and could be deadly if Black underestimate White's attacking potential.

I've personally used it to beat players around FIDE 2000, so it's fine for you to try.