I bought one of these several years ago and it's held up very well.  I needed to repay a bunch of favors a friend did for me recently, so I bought her one of these.  She tells me she really likes it and uses it all the time.  The reason for 4 rather than 5 stars is that these are a little light weight.  People who would be using a pressure cooker more than my friend and I may want to go to a stainless model.  They cost more, but would probably give longer service.  However, there's NOTHING wrong with these units.  They do everything you'd expect them to do.  One thing though . . .when cleaning them, be careful to not drop or traumatize the edges as they ARE a bit fragile.