I think Bravo works very well, as long as the capsule is attached properly. Insist on a doctor, not just a nurse or technician. You can read the little meter that reads the pH yourself. It clips on your belt or waistband.
Just in case the thing detaches early, as mine did, keep your own record of acid, also the time and what you eat and drink, if you are standing or sitting or lying down.
I have a terrible gag reflex and would not have tolerated a 24-hour tube in my throat. I have trouble just gargling mouthwash. When I had my surgery I woke up with a tube and had to try hard not to swallow or I immediately was gagging.