I provided an Oracle data recovery service for a US company, it took just one and half hours to get 8GB data recovered, from get in touch with me through MSN to finish the data recovery. Before they turned to me, they had spent two days in asking Oracle for help. There are three key points.
The recovery can be done by yourself with my online support. So we didn't waste time in waiting for me to be present.
Lower cost. Else they may not accept my service charge immediately.
Payment after recovery is acceptable. Time saving is very import for customers, I believe this when providing data recovery service.
They got disk problem, and lost all the archive log files, online log files and data files. After they restored the database from backup, they found the data files were in inconsistent status, data files were backup at different time stamps, and they lost one small data file for the user data tablespace. In this case, AUL/MyDUL is a good solution.
This is the fastest service I provided until now.