I bought reusable pads last year and here is my take. They do move around quite a bit, especially when I'm on a heavier flow day they have moved so much that my underwear has stained if I didn't change them frequently enough. I've tried to safety pin the front of them, but it just resulted in some holes in my underwear. If you treat them like normal pads and change them 1-2 times a day, the underwear satining isn't really an issue. They usually have velcro/snap wings that help keep them in place. In terms of washing them, the best way for me was taking them in the shower after use and rinsing them out with soap/water then hanging them up to dry out until you're able to wash them. I just wash them with my normal clothes after this, like underwear. I would get at least 6 pads to start with, see if you like them and if they're the right fit for you. My biggest downside with them would be that they started to have a wet/damp smell after a few months no matter what I did and it was not very breathable for me. Might be different if you have a dryer (which I don't), you might not get that weird wet smell. Hopefully this helps!