Demoing and purchasing from O'Brien Hi-Fi is quite simply a wonderful experience that all audiophiles should undertake when looking for their next equipment upgrade. Mark's incredible knowledge and non-pushy attitude meant that I bought exactly the equipment that was most suited to my listening tastes. I first visited over a decade ago and I've just bought my next set of equipment. I'm 100% sure I'll be returning. Best hi-fi shop in London. I certainly think so.