I don't use it so much since I've seperated as i don't need to please a man with a full meal every evening
However as pp said, you can reduce the time by taking the inner out and using on a hob to caramelise meat, onions etc. Then boil a kettle so you can add hot stock etc, and then it will come to pressure quickly - say 10 minutes and you walk away & leave it
Back in the day, I could prep risotto in less than 10 minutes, cook for 15.
Take a solid chicken from the chest freezer, cook it to falling of the bone in then blast in a hot oven to crisp up (oven has time to heat up at the same time.)
Beef bourginon, chicken chasseur or curry, bolognaise in about half an hour and the flavours are really pushed into the meat. That is the really difference compared to comparable stove top cooking.
i think you need to use it in combination with another method; in my case stove top cooking is the most frequent to get the best results.
The real advantages are improved flavour & tenderness, no need to plan and start a slow cooker in the morning. You can walk in at 5 /6 pm and have dinner on the table within the house whilst you get on with other things