I have the Pacific Western model 2. I am on my 3rd season with it, and so far I have had 0 issues. None. My father has the same stove and is on his 6th season. He has had no issues. I have 3 other family members with the exact same model and only one had an issue with a leak. The leak was easily fixed and he hasn't had an issue since.
The bad: Based on discussions I have had with other OWB owners, it appears as though mine uses more wood than comparable models from other manufacturers. I used slightly more than 9 full cords last year heating 1800 sq.ft. @73F, a 900 sq.ft garage at 50-55F, and heating DHW. This was with 26 full weeks of operation (mid October through mid April). Others report 6-8 cords under similar conditions.
The good: Loooooong burn times (based on a recent thread here). I can easily go 24 hours between fill ups. I even went 24 hours from the evening of 12/20 to the evening of 12/21. During that period we had 35-45 mph winds, single digit temperatures, and even a blizzard warning. Others on this forum are reporting 7-8 hours of burn time during the more mild days of winter.
I'll gladly trade a few extra cords of wood for the ability to have 1 per day fill-ups.