Canon S90 Review
There are really two choices: Put the ISO on the cool funky ring around the lens and the aperture compensation on the fiddly dial on the back; or the other way around. And the problem is that it’s hard to hold the camera without jostling that dial at the back.…So I’ve ended up parking the exposure compensation on the too-accessible back dial, because those adjustments are reflected in the CRT and you can tell when you’ve accidentally cranked it.
The camera’s great, but I accidentally hit the back dial, too. Setting it to exposure compensation seems to be the best way to minimize surprises.