I wish I had filmed this bad boy in use, it's incredible at getting brunt oil off oven glass and pyrex. I used it on our oven floor, which we had already tried to clean, and it immediately stripped off years of stubborn grease that no scrubbing could budge. So happy I bought one for my dad and friend, and my dad just rang me to say how thrilled he was with it. Sounds a bit weird to be so excited about a scraper, but it saves so much time and effort it really is so satisfying to use. I'm kind of annoyed I've got nothing else to clean now cos I want to use it again lol. The only annoyance is that it can be a bit hard to clean and if you rinse it, the blade will rust if you don't dry it immediately. The blade is nested between the plastic at the top and another reviewer here explains how it can be released (see the questions and answers section above). When I did this, the blade came shooting out across the room (might have put too much effort in it lol) and it was a bit clumsy to do. I would improve the design by making it easier to dismantle. I think the blade is double sided so can be turned around and used again. Be careful with it cos it's super sharp. Frustrating that the instructions do not explain how to open the device to switch the blade. It's still amazing though and a great price at between £3 - £4. There are other scrapers out there and I've only tried this one so I can't comment on how it competes, but it is very effective. Even though the handle is plastic, it feels sturdy. Don't know how many times you can take it apart and put it back together before it breaks though. Would advise anyone to get one really.