I have a Scanpan one. I love it and it cooks differently to a slow cooker (have one of those too but don't use nearly as much).

Favourite thing to cook - I have two.

1. Whole chicken in 2 litres of water. Makes poached chicken meat for other meals etc. or to put back in, and 1.5 litres of chicken stock to have as a soup or use as a stock for things like risottos . I normally cook the chicken, retain the water, pick off the meat and then place the carcass back in and top up with 500mls and put it back on again to make a stronger broth.

2. Corned beef and veg. What would normally take 1.5-2 hours of cooking on the stove top takes literally 30 minutes in the pressure cooker.