Can anyone give me a breakdown of what each method of linking does so that I can determine what is best for a project.

Link as overlay, Link as Attachment, Bound Link

Also any pros or cons or issues you have had with each would be great.

On a related note if someone could answer these questions about binding links.

When binding and you Attach detail does this work for keynotes so if we have keynotes in the link and then bind it to the main model will the keynotes populate a keynote schedule?

If the bound link gets updated externally (in the original link) how do I manage that change in the main model? How about when it becomes a group after beeing bound, can I make it back into a link?

Because binding makes links groups and groups can slow down models how is it best to manage these?