I've been running the Apex-i SAFC for some time now without any probs. It yielded 10whp @ 4psi. Worth every penny.
You can DL the manual from
http://www.apexi-usa.com/documentation.asp
Installation is a matter of sniping one wire and tapping the rest like this
http://www.pbase.com/toycam/image/12448592
Here's a diagram for the 1MZ-FE ECU pinout
http://www.pbase.com/toycam/image/12448593
As for making adjustments, it's fairly easy. Most tuner shops are familiar with them. Ask to make sure of course.
*Note: install may be diff for your application.
Edit: forgot to ask...how aggresive do you intend to do with your setup? The SAFC has limitations.