I've been using Refrens for less than 3 months if my memory serves me well. I'm finding it hard to keep track of all my quotes and invoices since some of them require me to go back and check even after they are paid. It would make more sense if there's a feature to put them in group like. Feb, Mar, Apr or maybe any different category. I know filter and sorting could do the same but once you go to quote after another, sorting would reset and it's overall not the same thing.