Fairly fool proof because it's hard to get it to develop streaky. It's a very natural colour, would say it is a light colour, would be great if there was a medium option. As I normally end up doing around 3 layers. Inevitably goes patchy around joint areas after a few days so extra exfoliating is necessary. A very hydrating product with only a very very mild smell. Would say it last well for two days, around day three it's time a re apply. No guide colour but if you have even a tad of tanning finesse it shouldn't be a problem. Photo is after one layer, (I have naturally olive toned skin)