I've never heard of anyone bricking their ECU using TuneBoy.
Any of the issues I've read about always seem to revolve around getting it to work on a non Windows computer, ie Mac.
I've been searching it for ease for operation, risks ect. Being a car tuner myself I'll get the making changes part ect and know what I'm changing. Just don't want to deal with unstable software and bricking the computer.
After adding 10%ish around idle and off haven't had the fear of being a$$ packed at a red light.