This is a House clone, but it's rather well done in many respects. Jane is not just a thief turned thieftaker but a semireformed criminal turned detective for his own reasons, which grounds that aspect of the character. Baker's ability to portray Jane's pleasure in dominating people while still showing the workings of his new conscience is key to making this work. Robin Tunney doesn't get much credit but Lisbon's refusal to commit to Jane personally (despite her feelings,) because he's only semireformed comes across to me.
Sometimes the mysteries are weaker but this is inevitable. What really hurts in the long run is the dreary Red John mytharc, which is just as bungled as most long term open-ended storylines are. The mania for serialization keeps screwing shows up.
Some long term weaknesses are showing up in the writing for the subsidiary characters. Lisbon is being played as an adult, but both Rigsby and Van Pelt are having their characters warped by the insane determination to show growth. Cho, as the other adult character, is just revealing other sides to his character. As an ex-gang guy, though, I must say that hooking up with a prostitute is perfectly believable. What isn't believable is the retconning where what's-her-face wasn't really a hooker.
The final judgment on the series depends on the climax with Red John. If Jane rejects the final demands of conscience and kills Red John despite Lisbon, putting him into jail for life would be an honest conclusion. And Baker has done the role well enough that Jane choosing Lisbon over personal revenge, instead of justice, on Red John could also work. But the most honest conclusion, Jane failing to catch Red John, would probably be beyond the series' writers.