Cloth vs Throw away

Brittney
Ok so I have been using throw away diapers for 18 months on my daughter and I used them on my son but they are so expensive and I'm thinking about using the cloth but i dont know really where to start. I know a few people who have used them but I'm not close enough to them to talk to them about it and I need some opinions. 
If you use them can you give me some pros and cons to using them.