I am not a SharePoint administrator where I work but I needed some data from a forms library on the production farm copied to a stage farm for testing purposes. The SP administrator tried many times in many different ways to copy the items over but could never get the recovery manager tool to do so. We could get it to work for small amounts of items and lists with not many items but eventually, if we chose too much to copy at once, it would fail with ambiguous errors and sometimes corrupt the destination list/items.
From what the administrator told me, the tool is very useful for other actions, and the company is still using the product today. I was just disappointed that I couldn't use it to get the data I needed.
Restoring at the item level is a plus