I still have and have used my camping GSI Hard Anodized 3.3L Pressure Cooker for a bunch of years and also am a real fan.
Even at 3.3L, I find it somewhat small. The newer GSI Halulite is built differently and is 2.7L, but that's close to the same capacity. Their safety systems are slightly different but neither use destructive methods and can be reused without replacing parts in the case of an accidental overpressure. In mine, any higher pressure would slowly push open the lid and pressure would escape
around the rim. It's never happened.
At home, I use my Presto Stovetop and my electric Cuisinart units with great success. Like Crockpots, they make great one pot meals, but are also handy for other things. Each June, for our church, we make up 5 dozen hard boiled eggs in the electric pressure cooker in 4 batches which take just over an hour for all, about 20min for each 15 eggs. When camping, stews, chilli, ribs, and spaghetti sauces are most common.