cheeeky fookers!
great gains as shown on Alan's graph MUCH better value for money than other maps! 
In your oppinion of course.

Or buy a 2nd hand Bluefin handset from another forum user. (Spent £185) , even less the R-Tech and have even more smiles

But thats my own luck..
anyway...
Each map from these companys has its own Benefits, Do your research fella. Revo has benefits over Bluefin, Bluefin has its merits over Revo, Apr and others.
Ive gone with Bluefin as it keeps your stock map loaded to the Handset, and doesnt add to the cars ecu Flash counter, whereas others do add to the counter, which isnt good for making a claim under warranty.
Unsure if R-tech does the same as Bluefin tbh.