I am a 69 year old semi retired commercial artist living in NYC. I've recently fallin into the rabbit hole of Budget Audiophilia ! In the past 4 months I have made 4 substantial purchases from MCRU ( David). I am in the process of switching out every cable, power supply, mains, speaker and subwoofer cable and linear power supplies with David's artistry. On a1-5 Star rating I would give them a 10 !  Explanations to follow:
Although not "chatty"; I found David to be professional and generous.  If you approach him in a straightforward way you will receive informed direct answers to direct questions. . Expect that if he is out of stock and you are respectful when notified that he might give you a better product than what you paid for.  Show me any company that will do that .  Shipping costs are what they are. They are in the UK and I am in the states; this is not Amazon I do not expect free shipping or even reduced priced shipping. If shipping is slow ; its no fault of MCRU.  They have to pack and label each order; time and supplies equals money.
 I normally do not take time to write reviews but David gave me a free upgrade and I was compelled to write a favorable review and read the other positive reviews that I was sure to find. I was shocked by the mixed reviews!  If you are reading these reviews and considering making a purchase from MCRU I would first suggest you read their " About US" on their website. This is a "mom and pop" shop in every sense of the word. Every minute they spend chatting is time taken away from orders they have to fill from paying customers. Once I realized that I have never sent a " hey where's my stuff" email. If you are in a hurry then buy a lesser product on Amazon. You won't find the quality of what he does there or for that matter anywhere else. Finally the rating system is flawed. The ratings should be weighted. A negative review from a 6 dollar CD purchase should not receive the same weight as a positive review for a product costing a 1000 dollars. ( IMHO). Email is the best way to communicate with them but keep it brief and concise. Remember to enjoy the music !