We bought a 2024 Overtrail back in January that we found with 5000 miles on it. We did not do a lot of research on the different trim levels at the time and some things were surprising like lack of programmable seat/steering wheel memory, but my wife really wanted a white/black GX 550 so we grabbed it while we could.
After driving it for the past 7 months, we have really enjoyed it with a few minor complaints. One is the lack of driver setting memory like I mentioned above. In addition, the relatively small gas tank and limited range is a bit annoying but the larger annoyance is the A/C system. The vents are limited and placed in a way that it's very difficult to get air up to your face. It seems to also take a long time to cool down - no ideal when we have it parked outside in the summer sun. Apparently the base trim is also missing some overhead vents in the back so the only air directed at passengers in the back is from the lower vent behind the center console.
The brake squeal issue is also real, but only in the mornings when backing out of the driveway. The Lexus dealership in Plano has the parts on order for the TSB, hopefully they will be here in the next month or so. We have been waiting 2 months so far.
This is the first Lexus we have owned, previously had a X5 and a Range Rover Sport. I would say the drive is comparable to the RR, although the overtrail is a bit of a stiffer ride. Overall we are happy with her.