I purchased the Unitron Tandem 16 CROS/Bi-CROS hearing aid a few weeks ago for $3645. And the initial results are very good. As someone who has lived with SSD all my life, it's quite an experience hearing things now on my deaf side. I've done many double-takes recently, thinking I'm hearing something on my good side, only to realize it's on my deaf side. I can actually boost the deaf side hearing so that it's louder than my good side. But I usually don't do this and instead try to keep them equal. My audiologist said some of his other patients are getting similarly good results from the Tandem 16. I still need to do some loud restaurant tests where half the gathering is on my deaf side to see how well it performs in this critical situation. But for normal day to day environments, it's working out very well.
In a month or so, after I've done a number of restaurant tests, I'll post more comments.