My mother used to use an old fashioned Prestige pressure cooker, very successfully. Many years ago I bought a more modern one - stainless steel and without the weights on top. I bought 2 new seals about a year ago because I wanted to get it back into operation but when I put one on, I found the lid wouldn't lock - something has gone wrong with the mechanism. It's a shame because it's still in excellent condition but totally useless as a pressure cooker and I have loads of other steel pans anyway. I would buy a new one because they are great time and money savers, but I can't afford it, so I continue to waste money on fuel but try not to use slow cooking methods to save electricity. There are ramifications to that of course - cheap meat can be slow cooked but fast cooking needs more expensive meat. Can't win!