Very good and they cover up to high on the arm and you don't feel anything from the fire. The only downside is that they come in one size.

NOT AT ALL COMFORTABLE, they are excessively thick, with the result that you cannot easily hold a fork or tongs or anything else someone uses while cooking; in no case are they comfortable for the temperature. I haven't checked that yet because I haven't had the chance to grill yet, but when they arrived and I put them on, I couldn't even hold the remote control, let alone tongs or a fork or something to turn the meat while grilling! Also, very expensive for the final product!!!!
I will update my review when I use them during grilling to see whether your hand actually gets burned inside or not!!

The same product is offered by a well-known toy chain at a much lower price. They do a good job, but they are not suitable for professional use, meaning in a professional oven that bakes at 230 degrees, you can only hold the tray - sheet for a few seconds...

It does its job just fine, I grab the grill and flip it over without any problem. The glove is long enough, it covers a large surface area.