Matrixify

I would give this a 10 star if I could. As our home and garden store https://wroughtironhaven.com/ is a large one download/upload updating is essential. We use a lot of metatags to store back end data which can't be done with shopify's normal export. I don't think we could actually run a good quality store without this app. The support is next to none! very helpful always. We have been with them since the beginning and have seen the expanding of more and more options, even allowing updates by variant sku instead of ID or handle. Trust me it's worth the money when you have thousands of skus especially if you are migrating from another platform like we did from x-cart and your suppliers use skus codes for inventory.