This is an excellent little remote shutter release for Nikon's D40, D40x, D50, D60, D70, D70s, D80 and D90 DSLRs, handy, portable, simple to operate: all you could really ask.
It should be noted however, that despite Amazon's frequent offerings, there is no point in getting one for a D100, D200, D300 or D700, or indeed any model of D1, D2 or D3. These cameras only take Nikon's range of 10-pin accessories, and don't have the sensor that the ML-L3 requires.
This doesn't take away from this excellent device: just don't get it if you won't be able to use it...