These guys are scammers. They read the barcode scanner on packages to make it seem like they got delivered and never deliver the package.
I made a same day order from Amazon which used this unreliable carrier. I was home waiting for my package, then I get a notification from my phone saying that my package had gotten delivered to the front door. I open my front door and nothing. I walk around my neighbors house and I saw nothing.
I check my security cameras and saw nobody make an attempt to deliver my package. Also, Dynamex Support line makes a fake attempt to call delivery guy and says to get a refund from Amazon. It's like they already know they suck at being couriers.
Fortunately me, from Amazon, I will get a refund. DO NOT USE DYNAMEX; They claim they delivered the packages without actually delivering packages.
Review about: Dynamex Same Day Delivery Service.
Reason of review: Did not delivery when they said they did.
Monetary Loss: $40.
Preferred solution: Full refund.