I use the exact one pictured by James.
Not a fan of the wooden ones for a couple of reasons:
some bright spark at the flight school I rent from made a whole load from a wood of such a shade that it barely changes hue when the fuel touches it, rendering it near useless. Personally I feel it must have taken a lot of talent to find a wood with these properties and secondly despite having the aircraft reg sharpie markered on them, I keep finding dip sticks for the 152s in the 172s.
Not helpful.
The dipstick itself is marginally more accurate than the gauges. I really just use it to check that we are all in agreement within a quarter of a tank or so, as I don't tend to do long flights that are fuel critical. At least the dipstick doesn't go below zero if someone overfills the tanks as the gauges on one 172 I fly do
