Longer-term readers of this forum may be aware that trials of this device - available very expensively in the UK and Europe were underway at Nottingham University and the results of the research study were going to be published some time ago. But no news - so what's happened. The answer's on this link
http://www.tinnitus.org.uk/RESET2
Basically the tinnitus clinic who were sponsoring the research didn't like the results and have prevented publication. The key sentence here is the following: "The End of Study Report did not report a significant difference in the primary outcome measure (global Tinnitus Handicap Questionnaire scores) between the treatment group and the placebo group."
Ie long-term outcomes for people using this expensive device were no better than placebo users. For a long time people have been questioning whether this expesnsive device is worth the money and now the evidence is out there, despite the tinnitus clinic's attempts at censorship - the answer is no.