Pretty good but values vary a bit
Not bad at all for the price. I gave it a quick go this morning to see if I could calibrate my speedometer with it, and found that the results jumped around a bit from 65km/h up to 73km/h a bit faster than I think my car can actually accelerate - and I was trying to drive steadily at the time! But mostly it was pretty smooth. I'd like to see landscape mode as that's how it best fits on my dash, and maybe there's a bit more work to do on filtering the results. I think I only paid $1.19 (can't see the price while doing my review!) so seems like good value to me.
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