Nice 'n Easy is probably the easiest home hair colour I've ever tried, and I've tried a few. I mix it in a bowl and apply it with a hair colour brush, rather than from the applicator bottle, so I can't comment on the applicator.
The colour (a soft copper) is true to the box illustration and amazingly for a red, is pretty fade-resistant. It is also multi-tonal so it gives subtle highlights and isn't just one flat colour. It covers my few grey hairs well, although they do seem to grow out much faster than the other hairs.
I prefer to have my hair coloured at the hairdresser, but for those times when I just can't get there, this is a good alternative.