I would not be too worried about the interview process at CAL, it is pretty straightforward. If you have done interviews before then CAL is no different. You will be interviewed by at least 5 people consisiting of mgmt pilots, possibly a senior mgmt person and perhaps the Company Psychologist too!
The sim eval is where you have to "shine" in otherwords, demonstrate that you can fly and take "instruction". The medical is 11/2 days and they will check everything.
Much has been said about CAL on this forum and I would have to say that the sentiments shared by the majority are fairly accurate. It really is what you make of it - some like it
Personally if you love flying and a career in aviation then you are best to look elsewhere!