Need Opinions. Have nothing to compare to.
That said, I would't bother with buying a sensor like that. A oxygen sensor needs a controller and interpretor to give AFR. AFR gages and loggers work with specific types of wide bands. This is true even within a brand. My older LM1 uses a different WBO2 than the newer LM2.
Ok. Makes sense. This just seemed like a handy simple system. He showed it to me and it seemed pretty simple. It had the sensor and controller and the readout was just a row of red and green LED's. Center group was green and outer edges were red. He said it was handy because he knew if it started tripping into the reds, it was time to look to see what was going on. Only thing it was missing was the bung to weld into the exhaust pipe.
Its nice to have extra parts, second engine, etc. I hope you continue tuning with your current set up as well.
Oh, I have no intention on giving up on my current set-up. It runs good and I will play around with it. Prices were just so good on the extras that if I didn't end up using them on my Charger, I could always resell them.
1976 Complete 400 (oil pan to intake) with the Edelbrock intake and 906 heads - $300 Figured if I ever did want to build another 400 (or 451) it would be a decent starting point.
Mildly used Demon Speed Demon 750 with a lot of new in package parts - $100
Pair of 915 heads that have been reworked with hardened seats. Have valves and springs but no rockers - $150
HP exhaust manifolds complete with heat shields - $150
Plus he threw in some other misc items like new in package 440 intake gasket sets, water pump housings, a mini starter, etc.