A balanced view here is fundamental.
Pros:
1. A published study peer reviewed by 2 UK researchers.
2. No obvious business agenda, no obvious incentives to write a paper in English for a private clinic in Korea. Even willing to train doctors abroad. Here their answer to
@GoneAway matches what I had stated earlier in the thread. Journals do have "aristocracy" and publishing papers is tough for outsiders. I can almost see their paper being rejected many times before landing in Frontiers.
3. They only took difficult cases with VAS> 5.
4. Their treatment is original.
5. They exposed themselves reputationally to the world. This is a successful pain clinic in Korea whose business is already going well.
Cons:
1. Even if original, the mechanism of action of the method seems a bit far fetched. Why should static needle positioning alternated with nerve blocks cure tinnitus from such diverse etiologies?
2. Inconsistent statements. The paper claims 87% success and 7/10 points mean reduction, but in correspondence and even in the paper they say chronic tinnitus, bad hearing loss, ototoxic drugs etc are a poor prognosis. Do they only treat well some types of tinnitus more related to musculoskeletal issues? This is related to the next point.
3. Self-selection bias from patients. Tinnitus of patients approaching a pain clinic may not be the typical tinnitus (that would lead to ENTs). So maybe they treat successfully tinnitus related to pain conditions and this explains their great success. This is my main fear.
4. UK specialists I consulted and who responded to me have all suggested big caution in having big expectations here.
So in summary, if one is not desperate one might wait for the first reports of western clients. If one is desperate, the trip, the logistics, the long stay in Seoul etc are a big investment, but there is enough promise to be worth a shot I think.