The Premise
Tom Ellis plays the actual Devil, who gets bored of running Hell and moves to Los Angeles to run a nightclub called Lux. He falls in with the LAPD as a "consultant" after a homicide he witnesses, mostly because he's fascinated by a straitlaced detective named Chloe Decker (Lauren German). Case of the week, sexual tension, a therapist (Rachael Harris) who has to hear about God at $300 an hour. Created by Tom Kapinos (Californication) off a corner of Neil Gaiman's Sandman comics, showrun in earnest by Joe Henderson and Ildy Modrovich. Fox aired it for three seasons, cancelled it, Netflix scooped it up after fan revolt and ran it out to six.
The Case For
Tom Ellis is the whole show. He plays Lucifer as a wounded, horny British aristocrat who sincerely cannot believe humans behave the way they do, and he sells the bit for six years without ever getting bored of it. The supporting bench is real: Lesley-Ann Brandt as the demon bartender Mazikeen is doing better character work than the material asks for, D.B. Woodside brings gravity as Amenadiel, and Rachael Harris's therapist scenes are the show's secret weapon because they let Ellis actually act instead of quip. The procedural bones are competent, the piano needle-drops are shameless in a fun way, and Netflix's seasons visibly loosen up once broadcast standards stopped babysitting the writers' room.
The Case Against
The mysteries are Wednesday-night USA Network stuff. A body in a pool, a suspect who looks guilty, a suspect who was actually just sad, wrapped by minute 42. The "will they / won't they" spends multiple seasons in a holding pattern that would embarrass a Moonlighting rerun, and once the mythology stuff starts crowding in you're watching a show that wants to be about theology on a network budget for angels. Some seasons run 10 episodes, some run 26. You'll feel every one of the 26.
Who It's For, Who'll Bounce
If you liked Castle, iZombie, or Bones, you already know whether you're in. Anyone who wants a puzzle-box mystery, tight serialization, or prestige-drama stakes will tap out inside two episodes and complain that the wings look like a community theater production. It's for people who want a charming lead, a closed loop per episode, and permission to check their phone during the exposition scenes without missing anything load-bearing.
The Ruling
BACKGROUND TV isn't an insult here, it's the honest description of the delivery system. The show is built as comfort food — episodic cases, a recurring joke about how the Devil handles brunch, a romance that resets every finale — and it executes that job cleanly for a very long time. Ellis is doing star work, Henderson and Modrovich write to their cast's strengths, and the mythology is played light enough that dozing through ten minutes doesn't cost you anything. Where it earns the tier and not higher: the procedural writing is functional, not sharp; the emotional arcs move at soap-opera speed; the ambition ceiling is "fun Tuesday-night hang," and the show is at peace with that. No lecturing to speak of. It's got theology as flavor, not sermon, and any time it flirts with a bigger idea it hands the scene back to Ellis to make a joke about therapy. Fold laundry, sin lightly. The verdict fits.
Sources:

