if you find the data that it gives you worth the money, it seems like a good tool. Ive never heard anything bad about it, so i guess no news is good news?
I like that it can do MPG (idk how accurate it is) and volts (being in car-audio makes it a cool feature)
Overall though, for 164 (i think it is) its not a bad deal for the info it gives you, like i said, it depends on if you find that info valuable