Just got a Steinbauer Chip installed in my 2008 D4D Hilux today.
Since running 265/75/16 Mickey Thopmson ATZ 4 rib instead of the standard tyre size I have a decrease in power (as would be expected) so opted for a chip.
Heading away tomorrow for a hunt over the range and will post up some feedback as for performance etc.
All reports I have read seem to be positive, so hears hoping!!