air/fuel ratio gauge

have been looking around some for an air fuel ratio meter and found this one:
http://store.summitracing.com/partd...400442+4294822101+4294908392+115&autoview=sku

would it bee worth it since its not a wideband sensor?

i know i will have to buy a sending unit for it also but i gues i would bee ok with a universal one is this corect?

will one of these gauges with universal sensor be any good fore some tuning?

i cant realy justify a wideband sensor when i can get the car tuned at a chassies dyno for the same kind of money and i like to tune and work on my own car as much as is possible
thanks