Better Call Saul is a modern masterpiece. I enjoyed it much more than Breaking Bad, even though BB is pretty great itself imo.
What BCS has going for it is that it is entirely different in tone and themes. Jimmy Mcgill (aka Saul Goodman) is much more nuanced and likable than Walt ever was. In fact, while BB suffers from having a lot of characters that are difficult to like until you get to know them for a while, almost every character in BCS gets such great writing and dialogue that you can't help but love every single one of them. Especially Lalo, who was mentioned in a single throwaway line in Breaking Bad, but you actually get to meet him in Better Call Saul and he's an amazing fan favorite, and I love him.
One thing that the creator Vince Gilligan made sure to do in BCS was to include lots of layered meaning and symbolism everywhere and in everything. I watched through BCS twice, and both times it blew my mind; and then I'll watch some youtube video about the extensive usage of color theory that endows every single scene and object with hidden psychological meaning, and it'll just blow my mind again.
I'd also say the pacing is super excellent in BCS, I never felt bored in any of the episodes, cause the show uses its time extremely well. Going from episode to episode is very enticing and it was easy to lose an entire day as I watched and rewatched the series. BB had a pacing problem, I think, where it would slow burn me too much and wind up boring me, but BCS gets the mixture just right so it can slow burn while keeping my attention the entire time.
So yeah I'd say Better Call Saul gets my glowing recommendation.