Cant retrieve local records from store using Ember Data

I am trying to retrieve records which have already been loaded into the store by using this line in a controller:

var allProducts = this.store.all('product');

However, this is returning a strange object (see screenshot). When I call length on it, the result is "undefined." I have used the Chrome Ember inspector to confirm that records have indeed been loaded into Product before the above line of code is run. I thought since store.all returns a recordarray I could iterate over it immediately unlike a promise. Where am I going wrong please?