Mmmm...I only use TFA Banana Cream so not sure about the LA "strength". I would start a bit lower, perhaps 2.5% and adjust up. As they say, you can always add but you cannot take away!
Anyone else have experience with LA Banana Cream?
well Fizzmustards Nana cream and that runs at 5% LA Banana Cream. Although I didn't particularly enjoy the flavor profile myself, other people I let taste the juice loved it and my wife ended up finishing up the batch I made.
At 5% it is a very strong note and I can easily see it overpowering a recipe. Standalone it doesn't seem as creamy as the TFA version, I well prefer the TFA version.
EDIT: yeah 4% is too much, start around 2% - 2.5%