i bought one looks something like that from walmart last year, i got it mainly for pot roasts but i still can't figure out what i'm doing wrong,i marinate a chuck roast over night and next day i make as the manual says and i'm not happy with the way the meat turns out, it comes out very tender but tastless like all the flavoring was zap out of it and all flavor ends up in the juice ,vegetables come out good but not the meat i fix that by making gravy with the juice and smother the meat with it.wish i knew why. my chuck roasts always came out good in the stove top pressure cookers