It will probably work if you use a FlyinMiata O2 clamp, and of course if you wire everything correctly...My Greddy Emanage works fantastic. Don't know if anyone has ever tried the ApexI....
A couple guys could get the car running and maybe a tune iirc on it a while back, but the ecu would learn around the unit. This is prob at least 6-7 years years ago.
Read the F/IC thread. It will have exactly the same behavior. Many people claim that ECU's "learn around" piggy-backs without really understanding what that means.
AEM at least put some youtube videos online to help, but somehow even the people that designed it are misinformed and there are a few misleading directives.