To improve the lousy cup holders, go to a Sprinkler Irrigation Store and buy a plastic Green Atrium Grate for a 4" drain pipe (about $6).
Get the green grate, not the black grate (better fit for cups) then spray paint it black.
It fits perfectly in the existing cup holders.
It even has a lip that secures it to the lid of the armrest.
You will think it was made specifically for the 97 - 01 ES300.
Now back to the rest of the car ... amazing ride, great freeway gas mileage, quiet, excellent standard sound system, comfortable, adequate power.
Mine has low miles, 48,000, and I suspect it will be a typical Lexus and be trouble free as my prior Lexus purchases have been.