I own 2 and have had some great help from Zeagle on a request I had. No equipment problems, just some mods I wanted to make. Like any manufacturer and model, each has some negatives and positives.There are things the Ranger does well and some it does not. This can be said of any BC and the reason I own 2. One for each type of diving I do. I seriously doubt you will find any other manufacturer of scuba equipment or darn near anything else for that matter, that has better customer service than Zeagle. Be very wary of any shop that trashs any brand without good proof of the problems with the equipment.
I have been diving a while so I guess I should know but, just exactly what is "diver friendly" anyway? I would think that easy to adjust, comfortable, well built, good warranty, customizable and good customer service would fit the bill.
Customer service is the reason Scott is on this board. A while back a couple of customers were not getting responces to their emails from Zeagle and were getting upset and happened to vent on this board. One phone call got him on the board in less than an hour, their problems were solved (bad email server they were unaware of) and he has been here since.
There may be a good reason that some other brand of BC may better suit your needs but quality is not one of them.