Some nice, smooth, consistent quality. Better Call Saul was in my opinion pretty consistent. Single season anime is almost always consistent, like My Dress-Up Darling or Terror in Resonance.
Not dragging on longer than the series needs to seems to be a key point.
Killing Eve was good all the way through. Left me wanting more, which is very rare for a show that wasn't cancelled. Four seasons. CW: Lots of murder and some torture.