The actual UI is super speedy, it's only when looking at the map while driving. The streets stutter as you move along, and pixelate when you take a turn and the map screen "rotates" if you know what I mean. I've found that putting the "map viewing angle" to the birds eye view makes the issues worse rather than having the flat 2D layout (the 3D view looks much better IMO). It's just not a smooth moving map screen is what it comes down too.

 

 

I figure it's just a crappy map interface. It's terrible that Lexus would include something that looks 10 years old in a brand new car (visual and performance).

 

 

Yup. 10 years ago I bought a 2008 IS250 with navigation, and it was pretty cutting edge for that time (compared to most of the competition). But the evolution has been almost non-existent whereas all other brands (including the American brands) have far surpassed them. To think that you will spend almost $100k on a brand new LS500 and still get a wacky UI, sub-par maps graphics, and no Apple Carplay or Android Auto, blows my mind. You take a look at what the E or S-Class are packing in, or the new A6/A8 and the brand from a technology standpoint is laughable. Luckily they have the tried and true reliability and build quality to hang their hat on, but newer buyers EXPECT more tech especially at the price point.