I do a very lot of canning on my glass top stove. If I'm canning, I usually can at least 3 canner loads up to 6 per day (mainly the weekends). I can meat or beans which take 90 minutes to can after the pressure has built up to 15 pounds. Make sure that the canner you have has the extra metal round piece on the bottom of it and not a flat bottom all the way across. The canner that I use is a 23 quart canner and I usually put as much as possible in there. I have had 20 pints at one time in my canner; 7 quarts and 5 pints (the new short wide mount pints); or even 5 quarts and 4 pints. I have not had a problem with the canner on the stove. I do not push it around on the stove, I pick it up and move it and YES it is heavy. I didn't know that you weren't supposed to use the canner on flat tops until after I had gotten my. But canning is a way of life for me, so I decided if it breaks I will have to just go get another stove. So far - so good. I also use my cast iron and copper bottom pots!