Not excited.
This needs to be more than Saul buffoonery and Breaking Bad cameos.
I think Vince could have done much better than this. If he wanted to stay in the Breaking Bad universe, I think he should have done a show about Mike going from cop to head hitman for drug cartels. That would be interesting, similar to the feel of Breaking Bad, and potentially successful.
Saul just doesn't have the depth of character. He's a quirky, funny guy good for one liners, but what the hell is going to carry the show? Seems like it can't be anything more than a procedural with hijinks and outlandish criminals that he gets out of going to jail. Which was already done with Jesse in Breaking Bad.