A chip that plugs in using vampire clips..... run for the hills. I'll bet this thing could switch your tv signal from VHF to UHF though. 
I like how they say "tailored to each individual vehicle", yet their chip-to-vehicle information is all universal/the same.
Like VXorado said, you either need a reputable access port or a pro-tune. Something like the Cobb AccessPort, which is easy to use and popular with many tuners. With the hardware proper mods, it allows you to remap the ECU and get some pretty solid gains. Sadly, no such luck for ISUZU.
Gary Noonan
'01 S/C VX / '18 Forester XT