Cortez - any experiences?

A few months back, I had surgery to remove a pituitary macroadenoma. Now I’m stuck on a 30 mg daily dose of Cortez because my cortisol levels bottomed out. From what I understand, that 1.5 cm tumor was sitting right on the left lobe of my pituitary gland. Before all this, I wasn't on any kind of hormone replacement... everything seemed perfectly fine. All I have to go on are the labs taken immediately after the procedure, since I haven't had any follow-up testing since then. Here they are:

8 AM cortisol: 252
4 PM cortisol: 104

For anyone else here who ended up on this medication... please, tell me your stories. How long does this last? If I'm looking at a lifelong prescription, can I at least hope to taper down from this massive dose eventually? Also, a bit of a side thought... right after surgery, they had me collecting urine in a plastic container for 24 hours, but the hospital staff didn't actually collect the sample until four days later. Can those results even be trusted?

I am also on long-term Cortez therapy, though for different reasons. I’ve been taking 20mg daily for about a year now, and I haven't really noticed any side effects.
I used to struggle with some hormonal imbalances, but since starting this treatment, my lab results have remained stable.
As for your test results... isn't it strange that they didn't run them after you had been on the medication for a while to see if it was actually working?