What sounds good to one person may not sound worth a dang to someone else? That's where your field testing take charge. If your calling birds in regularly with your calls every year, every week, every day then they are worth putting on the market, if they are made well and perform well. If you can't call a bird in then they still need some work. What we hear and what the birds hear are two completely different subjects. You all so need to know how to build a call that matches the sounds a customer is looking for, otherwise you narrow your sales to certain people only. If your building show calls, then everything has to do with looks, and a little bit in sound, but looks are very important.