Thanks + Suggestion or Feature request

Hi, first I just want to tell You this is an awesome plugin! it was just what I was searching for, well, almost. The only suggestion I have is to have the option to choose not just quantity but price.

I suggest this because in my case, I have a booking plugin installed so the price changes not based on the quantity (number of rooms) but in the number of nights, a custom field used for this. So a person can select more than 1 night but the quantity will remain as 1 so no discount is applied.

Anyway, thanks for such a great plugin!