I recommend the
RECI. Classes are local and taught by local inspectors and industry specialists.
Code update classes for the last few cycles, have been held at the VFW hall at I-96 and Inkster road, there are others but that has been the west side location.
Other classes are available. If you sign up for the newsletter, they will contact you when the required update classes become available.
Normally a full weekend course with meals. Reserve a seat early.