Al Gill has been around for a looong time, he has 100s if not 1000s of happy customers, and I'm sure a few unhappy ones because you can't please everybody. He breeds with the goal of producing police K9s, and he likes a specific kind of dog for street which may or may not be what's popular at the moment. I won't paraphrase him on what kind of dog he likes because I'm afraid I would misquote him! But he's an honest guy, he'll tell you what kind of dog he has, what you might expect from a pup and if he thinks it'll meet your needs.
A long time Schutzhund guy at our club, who just put the IPO2 on his dog from popular Czech lines, was just saying at training last week that the best working dog he ever had was a pup he got from Al. I used Al's new male Dago on my bitch this year. I didn't breed to sell pups, I bred to have a pup to compete in IPO. My 1st priority was iron clad, unshakable nerve; then good prey, then accessible defense; and finally good structure. I did NOT want any "slow maturing" or weird "fear periods" or any of that nonsense. My pup is just 4 months now, but so far she is exactly what I wanted. Here she is annoying my husband for the ball: Abby von den Wachhunden des Bach, not quite 4 months - YouTube
Her 2nd bitework session was at night and she was under 4 months, she was right there at the end of the leash - never hackled, never took a step back. So I'm very happy with my Haus Gill sired pup so far.
All that said, I don't know if Al has the right pup for you because I don't know you. There are lots of good places to get a good working pup in MI/OH/IN/IL/TN, including people on this board, Al is just one of them.