I created an OB store back in February to sell T-Shirts and other apparel. I have a little over 100 products listed. I haven't used OB since.
It's not of good use for me and my products yet because I can set the prices only in BTC and seeing how much the BTC price fluctuates, I would have to readjust my products prices every day, maybe even multiple times a day. And I can't do that with over 100 products.
Also, I tried to set up a personalized username, but that didn't work. I've contacted both OB support and onename support. Both parties said I should talk with the other party.
Also, IPFS integration with OB is needed if they want to attract more users.
I'm looking forward to the OB2 though.
PS: One small remark about your post. There is one restriction. You are not allowed to sell anything illegal on OB (unlike the darkweb).