I wasn't in Long Beach, but I was a CA street cop and this show catches the tone, cross-talk and culture well (so far, I'm halfway through the series). There are very few shows that accurately do that (two others being Bosch and Southland). But unlike those shows, it's only 30 minutes.... one of the few cop dramas I've seen in a 30 minute format since Adam-12, and I like it.
It follows a trainer and trainee unit, Officer Harmon and Officer Diaz (Troian Bellisario and Brandon Larracuente) patrolling in Long Beach, CA. You have the usual drama you've seen on COPS that comes from responding to patrol calls, plus the rookie needing to apply the academy to real life, conflicts of cultures and work eras.
When Harmon and Diaz are told to stand by and observe street drifters at an intersection, the rookie is frustrated at the inability to do anything. The show has the "old-school" cops that remember being able to react to a crime, not just observe. Sergeant Lasmen and Officer Barlowe (Eric LaSalle and Mac Brandt). LaSalle is always great as a competent, but endlessly frustrated by the system, employee (which he mastered on ER). There are tidbits he brings to the character, like a quick swig from a non-labeled baby-blue bottle never addressed, but anyone that's had heartburn will recognize as antacid. LaSalle also directs most the episodes.
Brandt's Officer Barlowe feels a bit darker. He's reminding me of a character from a Joseph Wambaugh book. Officer Barlowe's handling of a homicide body part had a hint of Rosco Rules from The Choirboys.
If you enjoyed Bosch and Southland, you should like On Call. If you don't like those shows you should still check this out because at only 30 minutes it's quick and you might find something else on the show that works for you.