I've only used Bintel the once - when I purchased my Dob a week or two ago. I ordered late on a Friday afternoon. It was indicated that delivery would be on Tuesday of the following week. When that didn't happen I sent a polite e-mail very late on the Tuesday asking if they had experienced a courier problem. The next morning the shipment arrived so I rang and asked them to ignore my e-mail.
I had two follow up 'phone calls from them asking if all was well and apologising for the delay (thanks, Michael and Rob).