I searched and read many threads about glass top stoves, and aluminum vs SS pots. I've been brewing with a twenty quart aluminum canner on my new Matag Glass Top stove. It boils 4.5 gallons pretty well, I have to turn it down some when it reaches a full boil. I recently bought a 35 qt SS pot, it wouldn't boil, even with only two gallons. In addition to different metal and larger volume, the new pot was much wider. The aluminum pot has a narrower bottom than it's outer diameter, so all of it fits on the element. The newer SS pot, with a thick sandwich bottom, overlaps the element by more than an inch all around. It also had a very slight arc to the bottom, not good contact. The stove is electronic, the elements pulse, there is some kind of sensor. I returned the pot due to the arced bottom. But before I buy another, I'd like to hear from other glass top brewers. I plan to find a narrower pot, and hope that helps. Has anyone had success on a glass top with SS? How much faster is aluminum? Thanks.