I found my webshop to have become rather bloated. I was using the UX Flatsome theme, and wanted something really fast - preferably achieving the look I want, without too many plugins.
I found mythemeshop, and installed the ecommerce theme (after testing a few of your themes). Not only is it a really nice and fast theme, the code is so well written that it's easy for me, with limited php and css skills, to make small changes.
And when I can't do it myself, I ask in the forum - and I've gotten great help. Within hours there is someone on the case, and I've gotten code that fixed problems