I've been using Scan for a good few years now, and have always found them to be very quick and professional. On top of which, I've had to return things to them as well, and they've always been courteous when dealing with returns requests.
I've even used them at work to provide a machine as proof-of-concept to a customer, and said machine resulted in the customer buying several more similarly configured machines, albeit from a different supplier.
The strength of Scan's machine is that it has performed flawlessly, even while the machines bought through the other provider have had serious issues.
I suspect I'll continue to use Scan for many years to come!