Personally, I'm doubtful. These seem to force your hand to sit in a particular way, while practically when riding
the hand on the bars takes on slightly different positions; for example climbing in the saddle, descending off the saddle, cornering etc. I had some Tiogo ergo jobbies years ago and they would always twist and would always be wrong somehow. Good in theory, bad in practice at least for me. I guess they work if you are the type of rider who will settle in one hand position for many miles.