Hi! Background: I'd bought the Model X 100D in March 2018 with the standard audio system and was thoroughly underwhelmed by it. It literally sounded like I was face deep in mud. I looked around at the forums and saw that Reus seemed to be the most popular choice for the Model S owners and didn't see too many Model X owners come forward with their experience, so here goes. Reaching out: I called the Reus Systems business number and was patched through to Cliff. Cliff said he won't be in the Bay area for two months but suggested I make the trip to Orange,CA to best get a sense of the before and after. And I'm very glad I did that. Following the first call, Cliff forwarded the Model X price sheet to me. You basically get to choose from 4 levels. The prices are 2996$ (8" woofer, upgraded tweeters, additional speaker, extra cost for woofer control knob) 3996$ (10" woofer, upgraded tweeters, additional speaker, control knob included in price.) 4496$( same as above but with "premium" tweeters) 5996$( all inclusive hi-fi) I was choosing between the level 2 and level 3 system when Cliff suggested I go for level 2 as it was better tuned for listening to anything from compressed to lossless tracks. The installation: Dropped the car off at 9AM at their shop and was asked to return in 5 hours. Rick, Cliff's partner, demoed me the "best" off the shelf speakers and tweeters(focal, burmeister) and compared them against Reus' in house versions. I was properly surprised at how much of a difference there really was. When I came back, I didn't really know they'd completed the installation at all! The Woofer module was mounted in the rear trunk cargo area, taking up 40% of the width and 80% of the height. The amplifier was mounted under the driver's seat with proper trim coverings, but I could see it clearly when sat in the rear seat. The woofer control knob was mounted under the central screen inside the little storage cubby, off to the side. Beautiful. Then they showed me the center speaker, it was mounted on the rear view mirror in such a way that it looked like it had been designed that way all along. Cliff plugged in a USB demo audio stick and waited until the crew gathered around me to watch my reaction (apparently it's what they do for in house installations, I gathered later). When the first track played, I involuntarily let out a gasp, it blew my mind. Suffices to say the drive back had me discovering layers to songs I never knew existed. I ooohed and aaahed my way home. Now my X is off to SS Customs in the Bay area for a full body Clear Bra, Powder coated 20" wheels and red calipers . Go with Reus. They know what they're doing. Over the next weeks, they're installing custom audio setups for the following cars: Ford GT Saleen S7 Rolls Royce Ghost Bentney Arnage Ferrari 488 I think your Tesla will be in safe hands compared to a dude who installs window tint and stereos from the same store.