Thinking of investing in one of these, with help from my tesco reward points. Have fair skin and a mixture of dark and blonde hair. thing is, I have a slightly red hair, in places so I'm not sure if that will prevent it working i.e the weird random facial hairs I've started getting look pretty dark to me but it's possible there's some red pigment in them so would that stop the thing working? Don't want to find out after I've spent all that money. Also, any honest reviews about how you've found it would be much appreciated.
Ta