Where to get tinting for Mercedes car?

According to SA, better use their own tinting Premium Guard due to electronic & wiring may cause short circuit if not install properly by other vendor, and warranty is gone if happens. But I would like to explore my options.

Any sifu used Shield Smith OKR before ? How is their tinting and costing quality ya? Especially on heat reduction, I’m very concern due to Malaysia weather is 🔥🔥. I’m considering to go with them on my Tesla.