Knot and Thread Design review for Qikify Upsell & Cross‑sell

Got this app for a specific use-case, which is to offer an upsell when a user adds an item to their cart. This app handles that situation perfectly. There were several other apps I evaluated but they wouldn't allow users to pick variants or quantity as part of the offer. I've been using the product bundles feature. It has paid for itself (for a long time) within days of installing it. I would love it if this app would allow us to create separate product listings so we could replace apps like FastBundle but currently we need them both as they serve different functions.