Unfortunately that site is a total waste of space. If they ever get any A2 bits in, they always list them on eBay in any case. The only thing prestige about them is their pricing, and I wouldn't touch them with a bargepole I'm afraid.
I have always been lucky with them. Landing when they had broken a couple of cars. Brokered a few deals on the back of being a good customer. last deal was for centre caps for my wheels. Great deal, they were on the car for a week until someone nicked them! It helps with only living ten miles away from the base.
Always had good service from them. In my experience they will always take an offer, and (due to the first lock down) stored a couple of big parts for me until I was able to collect.
I agree their pricing can be a bit odd (used parts being offered for more than the price of a new Audi Part) but do you your homework and they provide a good service.
No experience of them however this seems an excellent opportunity to acknowledge the amazing work @A2Steve and @Clackers do. However good bad or indifferent other parts suppliers may be, these guys do an amazing job keeping our little aluminium friends supplied with all they need (or their doting owners desire them to have!! ) at very fair prices. So thanks guys and keep up the great work!