ZenBox: Bundle Builder

I use this app to create small bundles of 4,9, & 18 options, so far it works great and Andrew's support is very helpful when small issues come up. Speed hasn't been an issue, the speed is slower when creating the first variant but once its been created and other people order that same variant, its much quicker. I'm guessing that is due to Shopify's backend itself and not this specific app so I don't have any problems with it. I switched from a more well known bundle builder app and like this one better!