Dog Training Classes

I’m looking to sign my dog up for obedience training classes if anyone has any recommendations? We have taken the puppy classes at PetSmart in the past and wanted to take additional classes but there are not enough people signing up for the class lately for it to run.

Has anyone had good experience with Sit Means Sit? How was using the collar? I can’t find prices anywhere on their site so it has me nervous how expensive it might be.