Really blown away by this product.
I have a 3 year old oven with which I have been really, really lazy - and have only cleaned perhaps once a year using a few of the big-name products you find in supermarkets. Each clean managed to remove recent fat & splatter, and stopped the smoke/smell from previous cooking sessions (!), but I started to notice streaks of dark-brown burnt-on grease over much of the sides and bottom that nothing would shift. I could reduce it a bit with some elbow-grease and a scourer, but I was concerned that it could damage the oven surface.
This stuff shifted it all, 95% in the first go where I covered everything, and the remainder in a second, more targeted, attempt at the remaining spots. My oven now looks almost as good as new. Plenty left in the bottle for future cleans.
You have to spread the gel on using a brush while wearing gloves, but, unlike other cleaners, there are no fumes or smells. You then wipe off the brown mucky gel using a damp cloth. The muck & gel rinses easily from the cloth in warm water. We're also told it's biodegradable.
I couldn't recommend Oven Mate more highly. Everything else now seems such a con!
P.S. Extra tip: soak your oven shelf/grills in a sink full of hot water and one washing powder tablet. The brown grease comes off with minimal wiping effort. Shiny like new.