For anyone hesitating to pay for the Business edition, I strongly recommend getting it. The "Custom fields for products" and "Guest checkout" alone are worth the price.
I am a newbie to Hikashop and, because of the huge array of features, we have had a lot of questions for the Hikashop Team. But, their answers have been quick and helpful. You couldn't ask for more. But, having all of the features open up in the Business addition so you can both learn how to use them and also add them to your site(s) is a very cool thing.
Just my thoughts...