diva cups

Bella
so lately I've been thinking about switching to a Diva Cup because I just don't like tampons or pads but I don't know a lot of stuff about them and I'd like to find out all that I can before I switch. these are probably all stupid questions but I just want to make sure I know about them. 
first of all, how easy are they to change and how often should you take them out and clean them? do you have to take them out every time you pee? also can they slip out? 
do you like them better than pads and tampons or would you not reccomend them?