Our first day of matrix training was yesterday and we were broken in gently... The system looks good, logical and well sign posted however, the amount of information we will be asking our editors for is far greater than currently. So, that should be interesting!
As we'll be using a lot of tagging & metadata to help us sort and display content within the site we'll need to collect far more when a page is created. The advantages are huge as ultimately it'll help with keeping site content up-to-date and relevant. The disadvantage is that we will need to sell the idea to our staff!
So, one training session done and 5 left to go...