The gain was maxed on Paradise P90, but the default volume sounded a bit low to me. Another person on this forum had a similar experience: Ultra/Super Power Hearing Aids with Semi-Linear option - #16 by TallRobocop
myPhonak app is pretty easy to use and you can adjust the volume to the max. TV program with maxed out volume was great for watching movies, because I could hear more sounds than with oticon OPN 1. However, if the phone display turned on to show messages, the aid would automatically switch the program to the low-volume Bluetooth Streaming and would return to the TV program after the display was off.
I have not yet received evolv AI 2400 so I can’t share my experience yet. I wore evolv AI 1600 only for an hour inside the clinic, but they could not lend it to me to test it in various environments.