Never heard of them....I would stick w/Yamaha. (3) times in the past I bought extended warranties on cars that (of course) the salesmen touted as pure gold. When it came time to use one, they wanted to put used parts on my wife's Honda, because, hey, the part that came off of it was now used, right?
In the second case, the warranty didn't cover any electrical parts; you guessed it, had to pay for a new power mirror switch myself on a Toyota.
And lastly: Had a master cylinder go out on a Mazda, 4 years into my 5 year contract...went to the dealer...so sorry, that company is out of business now....