I have thought about getting one of these myself.
For something like a G-tech, I think precision is more important than accuracy. At least it would be for me. I wouldn't care if it was always a tenth of a second fast as long as it was consistent, this is important for those who want to check out the impact of their mods.
For those who want a substitute for dragstrip timing, then it better be accurate and precise.
I hope whoever tests this evaluates both.