I am working with a hardware company on this. The main issue we are having is that the whole program is tailored to high-volume manufacturers; little guys like us are below the Apple radar.
To apply for the program, you need to supply a lot of information, including company turn-over and a whole lot more that should be none of their business.
Then to make it work, you must integrate a chip supplied by Apple that does the authentication. That's great if you are starting from scratch and intend to send millions of products. It's a pain if you already have a working design with thousands of devices out in the field with bluetooth, but not Apple's chip.
That's what's stopped us from signing up and doing it. Luckily, in our business, people would be buying mostly tablet devices that are exclusively used for the purpose. Android here we come, which is a shame as iOS is a much nicer platform to create something that works well and looks good in very little time.