I don't have first hand experience. I know how their business model works. They are nothing but a liaison office that outsources repair work. These companies are incapable of sourcing a genuine spare part for your TV, if something were to go wrong. In the end, they are going to go to MI or whoever the manufacturer is for a spare part, which even you can do outside of warranty. Why even bother with them! Besides; the quality of repair is questionable as they are not engineers from the manufacturer. They don't have circuit diagrams and official repair manuals from the manufacturer. What you will experience is a service engineer trying to pry open a part with a screw driver, as they don't know the right way to open it.
More than these useless third party repair providers, insure the device. If it breaks, its not question of repair, its just replacement and you getting back the insured declared value of the product. Isn't this better than repair? I think so.