Easify Inventory Sync

I've used this app for two purposes: to sync inventory between my own inventory and a product that I set up as a Collective Supplier (different prices, so different "product" even though shipped from same warehouse) and for bundles. It works well with a couple of caveats:
-Bundle items have to come from same location (I had one location for physical products and a different one for digital; had to "move" digital to the warehouse) and they have to be inventoried item (I said my digital product had 10K units, which I'm quite positive is higher than what I'll ever sell) -- thanks to Mari at customer support for helping me figure both of these out
-If you transfer items from one location to another, it does NOT automatically sync at the first location across products. But it's simple to go to the Inventory Groups screen and do it manually.