Welcome to our forum.
I've never seen or experienced one, but it appears that this is a top-of-the-line model made by a major manufacturer. From what I've seen, $8,600 is a good price for such a tub....especially with the radio (which can often cost $500).
Our 06 Optima will be installed soon. $7650 included ozone, cover lifter, step and chemical kit. 800 more for stereo as I recall. Majesta would have been 500 cheaper.