The GSSF matches are a lot of fun. You don't need to be good. The top shooter wins a pistol, the next 9 win money. Then they split the field into 3rds (or 4ths depending on the turnout), 1st shooter in the 2nd third(B class) wins a pistol, next 9 win money. Same for the next third(C class). If you're lucky you might be 1st in B or C class.
Lightsped, a 19c shoots in competition class unless you put a non-ported barrel in it. Competition class is still amateur but they only give prizes for the top 3 or 4 shooters. You would also be shooting against the Glock 34's, 35's, and other longslide models.
The on site armorers are a great benefit too. I took an old G17 and asked them to check it as I had heard there was an upgrade. He replaced the entire trigger assembly, striker, extractor, and extractor bearing. NO charge. I also asked them to check an old full capacity magazine. I told him it worked fine, it had just gotten very easy to load, was the spring weak? He replaced the spring and put in the newest type follower, again NO charge.