Callen cricket bats are amongst the most underrated bats going around, in my opinion. The bats are made by Ian Callen who was taught by Chris Hext Farrant while he was at Hunts County in the 80s.
I've had one of his bats since the mid 90s and its the best bat I 've owned and used. They seem a bit harder pressed than an average bat, and take a while longer to knock-in for that reason, but the sweet spot on mine is superb.
He also has his own willow plantation in Australia, which Geoff Watling of Anglian Willow helped him with.
He's also a very friendly guy in my experience.
All in all I can't recommend them/him enough