Haltech Nexus + STI 2008

Hi, I'm trying to install a Nexus on a street / time attack STI.

Regarding the Haltech CAN integration should I realistically expect to lose ABS, DCCD center Diff controller, Airbags?

The Haltech NSP says "Standary vehicle functions including but not limited to ABS, ESC and traction contol ; may not fully replicate OEM behaviour express caution when using these features"

Who's actually used this and how well does it work?

Thanks in advanced!

If you have a Nexus - I would literally pick up the phone and call Haltech tech support for the answer directly - they're usually able to give on the spot answers to questions like that for people who call them - Or at least I've always had awesome support when I have called in with something and they have teams based around the world so you usually get through to a real person who can answer the questions for you :)