CMFNYC I like iSale overall. It is feature-rich, easy to use, and deliver good looking eBay auctions. It certainly beats the alternative of crafting sale pages on your own. I cannot speak to other software. I posted three auctions and have bids right away. When I posted similar ones before iSale, some of them went unsold. That's the biggest plus for me. As for what others are saying. For me, I don't mind the badge. I don't mind advertising the product, if it does me a good turn. But I think you should be able to turn it off for those who don't like it.
I do have one big criticism...you cannot edit running auctions. So make sure everything is perfect before posting. The devs should really fix this. All in all, I am happy with the purchase.
(Version 5.5.2)