Many thanks for you reply, it was near the end of July so the 9 week period has only just elapsed. You're right, it is very early days but if it was me I would have replied the same day just to put the customer's mind at rest. I haven't tried calling them yet but I will next week if I don't get a reply to the email.
I was a long term customer of Hair Direct in America and was always very pleased with them - when they went bust I thought I'd try and source hair units from the UK. I emailed a few UK companies and this one replied first and I was really impressed with how thorough they were in assessing my old unit in an attempt to make the new one as close in spec as possible.
I know what you mean about the lack of before and after photos - I am taking a bit of a risk really. It was such a shame about Hair Direct in America as I was always really pleased with their products and service.