"Is it even worth it" is a pretty loaded question. For me at this time in my life, no. Until I am done modifying my kids and house, a mod for the 4Runner with such a large price tag will have to wait. I do miss the sound of a blower, though. Oh and having some decent torque is nice, too.
If you have not already trudged through the TRD supercharger thread in the 5th Gen section, you can read other people's opinions. There are some photos of the TRD offering around page 60.