Just placed an order with Scan last week for a couple of parts - noticed that my tracking number said DPD and not City Link as normal so initially I was a bit worried. Despite a few issues with CityLink over the years, they normally get things delivered and I knew roughly when to expect them (normally 10-11am).
However, the DPD service was completely painless and it's great that they seem to be employing some technology to give us something all couriers should have a rough idea of anyway. I really appreciated the DPD email confirming a one hour delivery slot, 9:30-10:30am, and they came about 9:45 - so great service! I've always hated having to wait in or ask someone else to be about, so getting a slot like that really improves the service 10x in my opinion.
I hope DPD is going well, it's another great reason for me to purchase from Scan! I suppose it's also worth saying that the Scan service was faultness with next day delivery of my two parts