I haven't checked lately, but this website http://www.angelfire.com/music/HarpOn/
I believe has some feedback about the CBH 2016.
They are unique. The button at the back is levered to allow a shorter travel, like a harmonica with straight-tuned plates, and cross-tuned plates under the hood, which allows bigger embouchure holes for more air-flow. Reed lengths are a little different from other Hohner 16s, at least in the first octave. Set up properly, they have a monster sound. The timbre (tone) is is different, probably due to the separate chambers for each mouthplate hole, but it's still a harmonica—still sounds like one, partly due to the playing technique common to all chromatic harmonicas.
Common source is eBay. One member here recently got one (like new) for under $100, but that's the exception. I paid $250 for mine a few years ago, and I've seen them somewhat less and somewhat more. Be careful, and only buy one that the seller will allow you to return. They vary in quality and condition, not always evident in the descriptions or pictures.
My guess is that many of the ones purchased on eBay don't get played, but are considered collectables because of their rarity and uniqueness.
As a playable harmonica, they're not too bad, IMO. I seldom play mine, because I like others better. In fact, unless you are looking for that next unique harmonica, you might consider buying or saving up for a mid-range or high-end new harmonica. It would be more similar to your other 16s, but it may be a step up from what you have already. The last few years have seen an increase in choice and quality that didn't exist in the 1970s and 80s when the CBH 2016s were made.