Training is great and if you are lucky enough to work in an office with experienced tax pros that are willing to take you under their wing, consider yourself blessed.
More experienced tax professionals are willing to help the first years
Cons
Sometimes appointments are set for you that are not properly matched. So you think you're doing a simple tax return, but then there's more to the story and now you have to ask the other tax pros how to do things you haven't been taught yet. That's usually fine, but they have their own clients to tend to as well.