The LSS+ is a great equipment group of features and gives Lexus a nice advantage over competitors. I am a big fan as well.
However, depending on the feature, there are some small remarks to be made as far as I am concerned...
- Dynamic radar cruise control: works fine, especially on versions with traffic jam assistant (all speed cruise control). But even in its latest form on the new LS it is still a bit artificial in calculating the right distance. In high density traffic, the distance to the car in front can be just too big (even in closest mode) which causes other drivers to enter just in front of you, which makes your own car brake... So perhaps it can still have a bit of finetuning, depending on the speed.
- Automtic high beams: in theory, this should be a very interesting feature, but I almost never use it. On a deserted road with street illumination I often still want to use the high beams when the automatic system decides that there is enough light... On the other hand, when the system is in use, I still get warning flashes of upcoming traffic telling me that the high beams are on. In reality, they just go out a bit too late... (even on the improved AHS versions with adaptive multiple leds)
- Lane departure alert: very useful item and works perfectly, especially in the versions with buzzerless steering wheel warning. One side remark: the assist that automatically keeps the lane centre is too nervous for me and will always constantly turn slighly to left and right trying to keep the centre... So I keep that last feature in 'off'
- pre-collision with pedestrian and bike recognition: top !
- blind spot monitor (sold separately from LSS+ in Europe): top feature ! Works perfectly.
- Rear cross traffic alert (combines with the BSM): even better feature ! Has already prevented me from having an accident with a pedestrian.
So basically, I really like the Lexus safety systems (and it is indeed rather disturbing to drive another car without these safety items), but the technology may still need some small improvements to make it perfect.