These G-Link gauges are posh electronic ones with similar internals to the likes of Defi, but at a much cheaper price. If you want super cheap, your best bet is a cheap mechanical gauge like Mike's recommending with the Autogauge ones. I doubt we'll be stocking those though.
i think theyre still gonna be accurate mate, maybe your kidding yourself if you think you need something to 0.1degree temperatures etc, unless you plan on running a 1200bhp rb26 or something. i dont think your going to be pushing the limit to within 1 degree so if you think about it you could save yourself a lot of money.
yeah i just have heard horror stories about shitty cheap gauges and cars blowing up and over heating ( coff my 300zx coff coff )
They're not good, they aren't very well made and use the cheapest of components. But they will do the job if you're after something cheap.