"WooCommerce support added in 7 days". That's great and the shop looks very nice in the demos. However, it seems the shop has been entirely forgotten since then.
My advice: DO NOT buy this theme for the shop functionality!
Be prepared to do a lot of custom work if you plan to use this theme with WooCommerce. Fuel Theme's focus is unfortunately entirely on the portfolio aspects of the theme.
Just to mention a few things that are missing:
1) Lacking support for variable products. Most shops have at least a few variable products. The extra drop down fields are not styled at all (to match the theme). Bundled/group products ditto, but that's not as expected. Support for variable products is a must.
2) Zero documentation for the shop, e.g. recommended product image dimensions.
3) Text on product listings in archives/the shop index works well in the demo, but not with all fonts. A "Text below images" option is included in most themes with WooCommerce support.
4) A proper theme gives support for product sliders/banners/category view/highlighted products, so offers/products/product kits etc. can be highlighted and promoted. Take a look at the simple (no bloat) SAVOY theme for inspiration. They really thought it through.
Then there's the bloat. For instance: Why are the sound files being loaded/enqueued if they are disabled? Those 5 extra HTTP requests are completely redundant.
We bought the theme more than a year ago thinking that "they'll get it done soon, they seem serious", but nothing has been done to improve the shop since then.
Other than that, the theme is great, but not a good overall experience, unless the shop gets some attention soon.