BK appears to have done a good job at keeping ash and flame away from the cat. This appears to help longevity. Some other designs have not been so successful. They complicate the story of whether owning a cat stove is more maintenance, more expensive, etc.. Some new designs are not the best, so it is good to watch the stove's history over time. That's one reason I am reluctant to recommend a stove that has only been on the market for a year or two.
This is absolutely true! They have put lots of R&D into protecting that cat. They have a great flame shield on the front that's easily removable, unlike others that are bolted in place. Their cats are also protected from behind by the way the bypass opens toward the front, shielding the back side which is equally important.