02 sensor data loggers, which do you like

I got one of those innovative for my car as of course I have the dual carburetors good lord knows I need some kind of clue of what I'm doing adjusting the two. I'm kinda at the just keeping an eye on it here and there when I'm full throttle or when its idling to give me some kind of baseline of where I'm at. If there's one thing that I would make sure to tell you is to have Summit Racing price match as they're close like $209 and I got them to price match eBay for under $150 and the install is quite simple.