Is it worth it? Since it is not fully functional at present, it is a big investment for what seems like Vaporware to some people. But, I bought into everything Peter Rawlinson has said since the beginning and I don't feel like he has failed to deliver so far. So, yes, I invested in Dream Drive Pro and I am anxious to see what Lucid delivers and how long it takes. Since I got the legacy pricing, I think it may prove to be a bargain. My Lexus LS 500 has the same current features (Adaptive Cruise, Lane Assist, etc.) but I think the Lucid System works better, smoother, and is less obtrusive.
Remember, TesElon Muskla has been promising Autonomous Driving for years, and it took years to get where Tesla is now, and it still is not what he promised.
So, Lucid may not compare today, but they seem to be more cautious about what they promise to deliver and when they will deliver it. If they don't deliver, it will be disappointing, but it is not a deal killer. The car is still AWESOME, and the features it does provide still have some value. And, frankly I prefer to enjoy the "pure driving experience" anyway. I bought the Dream Drive Pro in hopes that if my wife takes over the wheel on a trip, I won't worry as much. I have never, ever been able to sleep on a road trip. Maybe, ultimately, Dream Drive Pro will let me dream while she drives! And let me be the Pro Air GT Pilot when I drive!