Everything I have seen and read on the GX550 looks good with a several major exceptions.
1. The engine is so complex and user unfriendly due to the placement of the intercooler and associated coolant hoses, DIY maintenance will be extremely difficult resulting in a big increase in cost of ownership.
2. The face-scanning feature on the top of the steering wheel is an absolute no go for me. I know it can be turned off but I hate all of these TSS features that I am paying mucho dinero for and never use. Personally, I think the face scanner is over the top that's not safety, that's downright intrusive.
3. I am not a fan of a digital game cluster and the much larger infotainment screen as opposed to my GX460. I also hate that the HVAC settings are buried in the screen rather than physical buttons.
4. I would miss the KDSS in the Premium + trim, the one most comparable to my GX460. The Overtrail, while perfect since it is only a two-row and has the eKDSS, is way out of my budget and represents a massive jump from the outgoing model.
5. 22" wheels on any GX is an abomination, even worse that the 20s Toyota threw on the 4runner Limited. Toyota is forcing buyers to jump up to the overtrail just to get a proper wheel size.
6. Despite the price jump, some of the luxury features traditionally found on any Lexus have been abandoned - wood steering wheel, wood accent panels, etc. I know it is an off-road oriented vehicle but it is still a Lexus that is supposed to project Luxury. Considering the vast majority of GX550 buyers will never do anything more than daily commuting, these types of finishing touches may be missed.
7. The windshield would frighten me to death. It will be worse that the 5th gen 4Runner as far as rock chip damage by a mile.