I have Innovate in my car permanent install with a DB gage. Worked right out of the box. Be very careful with the grounds. follow the instructions. My O2 sensor failed at about 12k miles. I finally replaced it and all is well again. These are just a Bosch VW part available at any big auto parts store for about $60. Plan on replacing it about every 500 hours or a bit less.
Remember the problems in the forums don't really give a cross section of the real world. only a very small percentage.
The Wideband will definitely get you in the ballpark but how efficient the motor is has some effect. Burns oil, leaky valve guides, lots of blow by and poorly sealed ex pipes all have an effect on how well the WB reports and lives.
Innovate also offers even better data logging with additional products.