I've also done colour and image at House of Colour.
I've found it's saved me loads of time and money wasted trying on (and sometimes buying) khaki/black/orange/yellow clothes, when I'm a Sweet-pea Summer who suits blends of blue, pink, lilac, grey, as well as stronger but toned-down shades of navy, red and brown.
I recently did an update with an independent consultant who trained with HOC, who provides a similar service but is more keyed-in to what's in fashion and in the shops atm.
She took me shopping and gave me a much more personal (and expensive!) service, and has given me the confidence to wear much 'younger' clothes and not limit my choices to what I thought of as suitable shops for my age (47).
House of Colour was a good starting point for me, but I made the mistake of doing the style consult when I had a couple of stone in weight to lose, so didn't put the theory into practise straight away and forgot or mis-interpreted a lot of it.
But don't let my incompetence put you off, it's well worth doing (and I've just come back from holiday were I was astonished by the frumpiness of women much younger than me, and ones my age or a bit older who dressed in a style older than my mother!)