I feed partially raw - there are lots of websites dedicated to info about it, along with forums for discussions. If you feed complete raw then you have to be careful to make sure you get the right balance of meat to organs including liver, and bones as well for calcium. There are different ways of raw feeding including people who mince everything up into DIY raw homemade catfood, or those who feed whole prey or "frakenprey" - producing a balanced diet across several meals by giving e.g. one meal of kidney, two meals of chicken wings, one meal of liver, then two meals of beef chunks - weighed out to approximate the meat/organ/bone content of what a cat would eat "in the wild" such as small rodents, rabbits, small birds.
If you mince the food up you get the benefit of it being raw, but not the dental benefits from them having to work to chew the meat and crunch the bones - unless you mostly mince and give e.g. chicken wings as "play food" for their teeth.
I don't go for the full whack, but my two boys share a pouch of food for breakfast and then have a meal of raw food in the evening, with biscuits down in between. When you start off you give small chunks or minced meat, then build up - you generally can't just put a whole feeder mouse or chicken quarter down in front of a cat used to biscuits or whiskas and expect them to dive in. My boys are still sometimes a bit fussy with liver, and Monty isn't very keen on crunching bones if there's other food available but Rolo goes for them with gusto - only the nobbly end bit of chicken legs are left when he's done with them! Chicken is a fave but they enjoy beef and lamb, hearts (lamb/chicken), chicken gizzards and tinned sardines and egg yolks as occasional treats.
Haven't plucked up the courage to try feeder mice yet, since I used to have pet gerbils and still have a hamster. Maybe once day!