Today I am using Ecwid on my page http://badnorwegian.com/online-store, but I am not really happy with the internal interface in Ecwid, and to change the look and feel you need to do some dirty coding, which I dont know. But Strip looks really promising. Any one who knows if this is possible to use??
I answered a similar question here Integrate Stripe checkout (3 items)
Hope it helps you as it did for me.