I can't remember why I chose them for a business account. At the time I was working under the assumption that this was a "lightning strike" type of event which could have happened with any bank. I'm more inclined to believe it's Chase-specific now, or at least more likely with Chase, esp. based on other anecdotes in this thread! I was also inclined to believe that most large banks are terrible. For example, I have experienced extremely poor customer service with B of A, and Wells Fargo is a very sleazy company. However, my experience with Chase is by far the worst I've personally experienced.
I'm a very happy customer of Mercury Bank for my current business, FWIW.