Much of my review has already been said, but adding one more voice may serve to illustrate the overall picture.
I too was fooled into thinking this was a UK company by the '.co.uk' email and (what I can only assume is) a 'shadow' address (in the midlands, if I remember correctly). Like others, I only realised this wasn't so when the e-mailed invoice was in euros. Why this is necessary I don't know, unless it is to hide the probable increased delivery time from mainland Europe.

I ordered 2 belt kits plus brake discs and pads for all 4 corners (Ford Focus - not an unusual car). Ordered 6th July. When nothing happened for the whole week, I found these reviews and wondered what I'd done. On the Friday, I mailed Cartech pointing out that it was now the end of the week and I had heard nothing. Could they tell me the status of my order please?.

I received a mail on the following Monday saying that they were waiting for one of the belt kits to arrive from their suppliers which would push delivery to the week after. (2 weeks now - if, indeed, it happened). By now my aux belt idler was grumbling pretty badly so I told them I couldn't wait that long as I feared the idler was in imminent danger of failure and would they please therefore cancel my order and refund me.

The only reason I have offered 2 stars instead of 1, was because they did cancel my order and refund my paypal payment promptly, but otherwise the whole exercise was a dead loss.

So to summarise, This is a company in Germany, from where the correspondence and dispatch are handled. In spite of the 'UK connection' they are promoting, I couldn't find one. All the items I ordered were shown in stock and available for 'immediate dispatch'. This clearly wasn't true, so how anybody is expected to believe such claims in the future escapes me. I wasted a great deal of 'research' time on ordering this stuff and delayed my repairs by about a week-and-a-half (by the time I'd sourced parts from another supplier). They were not proactive at all when they realised they couldn't supply and just waited until I complained (presumably to buy time at the customers' expense).

My opinion is that there is something fundamentally wrong with the culture of this company. I would suggest they look outwards towards their customers and tailor their service to the expectations of 2018, not 1950, as driven by the rest of the aftermarket industry. The 'bottom line' - would I attempt to use Cartech again? No.