I use a Mirro, and it works for me, but honestly I've never tired any other brand, so I wouldn't say there aren't better.
I will say I have never had a pressure cooker explode on me, but that doesn't mean it doesn't happen. I'm always careful to check the valve before I cook to make sure it is clear of obstructions, and to follow recommendations for how full to fill it and such.
I cook beans in mine all the time, and very rarely do I remember to presoak. THey take longer, and perhaps don't end up as evenly tender, but they're certainly edible if you don't presoak. I never get any complaints. ;)