Alright, Tijeritas is indeed a cumbia group from Mexico, active since the late 80s. They're probably part of the cumbia sonidera scene. Now, the user wants a review of downloading their hits discography. So, I should cover aspects like song selection, audio quality, availability, and maybe the legal side of downloading. The user might be a fan looking to collect their music but might not know about legal options. They might also be concerned about where to get it or how to evaluate its quality.