Ioncube Decoder Review - Pros and Cons of Using Ioncube Decoder Online and Offline

Hi,I have a project whose files are encrypted with ion cube. I asked for the original source code but my client does not have it. How can I decode those files because I had not seen any ion cube decoder, I downloaded and tried couple of tools for decoding, but I am always ending up with errors and some thing messed up, I am not getting the correct output.

Ioncube Decoder