I bought four of these as I thought it made good sense to make four toasted sandwiches in one go. I found the product rather disappointing and have ended up with four bulky cages in the kitchen drawer that have not been used now for a few years.
The cage itself holds the sandwich very securely, but that is about the only positive comment I can make about it. The toaster slots are not really wide enough to allow you to make a decent toasted sandwich, even if you use the thinnest sliced bread on the market and are really mean with the amount of filling you put in. I found that all but one of the sandwiches I made snagged as the cage was either inserted into the toaster or as they came out, so sandwich presentation was not great (and I did put the butter on the outside of the bread, as recommended). The snagging also meant that ingredients ended up getting stuck inside the toaster and were difficult to remove.
If you do decide to give the cage a go, I would suggest you buy just one rather than make the same mistake as me.
I subsequently bought the "Diablo" Toasted Snack Maker and have found this is much better (more room for fillings), although it does waste some bread. But I would personally recommend this as a much better alternative to the Dualit cage.