One of the rear wheel bearings needed tightening up after 17000 miles.
The exhaust started to rattle slightly after around 22000 miles. It turned out to be a heat shield.
Front tyres seem to wear out very fast.
The car is very quick off the mark for such a heavy motor.
Comfort is second to none, it doesn't matter how long you are stuck in traffic, it's a pleasant environment in which to spend your day.
It is strange how your front tires appear to wear out fast, as the GS300 is Rear Wheel drive!
It is HIGHLY adviseable to purchase a lifetime alignment/balancing from a company like firestone. I own a 1994 GS300 and it has the same issue with tire wear. I was told the aluminum wheels are difficult to balance properly and they tend to go out of balance quickly, resulting in rapid tire wear.
With the lifetime free balance/alignment I simply have my tires balance/rotated/aligned every 3000 miles (when I get my oil change). This has solved any problems with tire wear.