it's a pity that there is no offical BigBuy app. If you have a problem, BigBuy distances itselfs, but they like to take the sales about that app.
The import works very good. To sync orders with your BigBuy-Account, works also good, but there is no good guidance. I have one big problem with the price in my shop. If I change the price, a short time later, the old price is restored. There is no help for this topic and everyone distances themselves so far. I hope there is someone who had the same problem and can help me?