I agree that most of the complaints come from people who had a Ranger and now don't like it due to "problems" with it, real or otherwise. As with any other product, if the buyer does not truly understand what he wants/needs the product to do and what it's capabilities and limitations are and then proceeds to purchase an item that is not suited for the job, is it the product's fault or that of the purchaser. It has been my experience that people who do this, tend to blame the product rather than accept they purchased the wrong "model" for the job at hand. I have been guilty of not doing enough research myself and ended up with a product that was less than what I would have liked.
As a matter of fact I have not tried a BP, YET-- I already have plans to give one a try when the water warms up a bit. One the board members has offered to let me test drive his. I am a firm believer in finding out for myself and hence the suggestion to try a Ranger rather than depend solely on others opinions.
Having given it some thought, I am beginning to believe that much of the reason for some people's dislike of the Ranger is where it sits in the overall BC lineup. Its more BC than most rec divers need and not quite enough to meet the needs of the tech community. Maybe that's why I like it, the upper limit of my diving is the around the mid to upper limit of rec diving.