The Ursus dogs have a great foundation. With that being said, the dogs have only maintained, they have never improved from the start. The Ursus dogs are all over the map when it comes to consistency in looks, built, speed and nose. If your looking for a good foundation of plott to start with and breed for what you want, the Ursus dogs are a great choice. I can tell you this, I have not hunted with a dog that have more stick than a Ursus Plott, and I have hunted with a few other dogs.
Now that is my opinion on the dogs. When it comes to the breeders of the Ursus strain I would be cautious. One can go to a magic show and see magic, but in reality all you got was out smarted by the magician. If you buy a pup I will warn you that the guarantee only is good if you return the pup. So it will cost you to buy the pup, ship it, hunt it and if it is a dud, return it, and pay to have another sent out. If you cull the pup you are SOL on getting your money back or another pup. When ethics are involved, I would be cautious again and be very careful how much is given without anything in your hand. Out West many good line of Plotts have been started from the Ursus line, but very few go back and buy pups from Canada. The West has seen the magic show and figured the magician out, now the magic show is headed to the East. JMO