The DHL driver asked for additional copies documents that were not included in the list provided by SendMyBag. DHL said that they always have this problem with SendMyBag users. (And looking at the other reviews on this site, it seems to be trend with them). We followed the instructions to a T, spent an entire exhausting evening packing everything exactly as instructed. Only to have to rush back and forth up the stairs like crazy printing extra copies and signing them before the driver left. We would have been completely screwed if we didn't have a printer. Terrible experience, and hardly what you want to be dealing with at the end of a vacation or a move. Contacted SendMyBag to complain. They wouldn't budge from their position that it was driver error, and yet they didn't really have a solution for what to do if our bags had been refused. They said that they would have dispatched another driver on another day. That's hardly workable if you are traveling soon. And it begs the question - would they have believed us if we contacted them claiming the driver didn't accept the package because of missing documents? Or would they have called it "sender error", taken our money, and left us with our bags?
Also, I got a very scammy/smarmy vibe from how they market their app, which the android version of apparently doesn't exist. In multiple places they promote their app, so when I finished the purchase, I ticked the box to pay 2€ more so I could track it in the app. I then tried clicking through to download the app in Google Play, but it simply didn't exist. When I brought this up, the company claimed that their app on Google Play was "automatically removed", which sounds quite sketchy. Yes, I can do tracking through the website, but is not convenient when you're traveling and wifi's unreliable.
I will be looking into their competitors MyBaggage (similar rates, better express rates) or First Luggage.