Works brilliantly and sandwiches taste great. Some sliding of sandwich contents to the bottom, but if you press it together really well it�s not so bad.
Main problem is the size. We buy standard loaves of wholemeal and it just won't fit. Because the sandwich doesn't go to the very bottom of the bag, the top sticks out of the toaster leaving an untoasted 3/5 cm�s at the top, and width wise (left to right not depth of sandwich) it's a real squeeze to get in. Have resorted to cutting crusts off now.
Ideally, could do with having a gusset at the bottom rather than a flat crease, which would allow it to drop further inside the toaster, and needs to be a couple of cm wider. Then this would be perfect!