Good app but there are better. For the record, all this app does is create FB conversions and LLA's for you, which can be done right in your AD manager account. The problem is that these conversions cannot be edited. This is a problem because let's say you create a conversion called "Kitchen niche" and as the name implies, it contains all the products in your store from the kitchen niche. Well if you add new kitchen products to your store afterwards, MERP. You'd have to create a new conversion for that product and now when you go to advertise any of your kitchen products in FB, you have to choose the original conversion or the new one, and thus, your data will never be comprehensive. Furthermore, with this app, you only have the capabilities of using 1 pixel whereas, with others, you can add multiple pixels to your store for even more advanced niche distinguishment. Imo, Pixel Hook is better as it does not have this issue.
This app is easy to use but you need to have a bunch of data to make it work. Basically, a lot of views or checkouts to build.
Basically, if you are new and not making sales, this will not work for you, but it has a good interface and good concept.