performance chips?

i was looking to increase the power of my car and decided to lok at performance chips. my friend told me that venom makes a nice chip for my car. it's called the venom 400 performance control module. i just want to know what you guys think before i buy something lke this. thanks.
here's the web site, sorry i forgot to put it up before.
http://www.coximport.com/venom/400.html

this same thing came up with eclipses about 6 months ago....i cant remember if it was NESpeed or Emonz or who...but someone looked those things up and it basically gives you the same effect as stomping the gas to the floor any time you press in the gas decently