Hey, 

I have tried this service today and I was a bit hesitant at first because I tried another service similar to this one and it did not turn well. 
The other service managed to decode the files but once I use them, the script stops working as if there is something wrong in them that I could not figure out.

and so I tried Dezender service thinking I might end up with similar problem, but it actually worked! Perfectly in fact and the team in charge of decoding was very helpful.
In fact, I asked about some parts of the decoded file and they managed to answer my questions professionally. I think they are really experts in PHP. 

I definitely recommend the service, and I will gladly answer any question you might have.

Good luck