What kind of problem caused the data loss?
If it was a physical disk problem, your chances of recovery are not all that great. You will be able to recover some portions of data, but definitely not all.
Recover software will try its best to get your data back, but there is no guarantee.
Some of your data may be cut off, and not completed.
You shouldent use programs that have been recovered. Music, documents, pictures, maybe even save game files should be fine, but some of them may be truncated/cut off