Opinions on iuds and Implants.

I know how I feel about them. I'm just wondering what other people's opinions are on them and why? Pros/cons/experiences. Just looking for general feedback. Especially if you've had both an iud and implant, obviously switched to one or the other not both at the same time. If you've switched from implant to iud or iud to implant why and which do you like better? I just like seeing other people's opinions. I know some people are against and some are very for.