Shark Injector OBDII Software

[sniff diesel]

Anyone seen these:

http://www.turnermotorsport.com/html/subcategory_d...

Basically if I've read it right it sounds like a DIY way of re-mapping a car's ECU. What are the likely pros and cons?

[ipwn]

Similar to bluefin.

If it's like any other ecu remap then same adv disadv apply..