It’s a good idea, but a few things would put me off;
First, it’s not always possible to line up the direction you have to walk in with the back of the van. Sometimes you have to walk forwards, which is no problem if you use a reel because you just point it the way you’re working, but with this jobbie the hose is for sure going to get caught under the vans tyres.
Second, the hose gets dirty. Sure it won’t be too bad on a pristine housing estate like that in the video, but in the real world all kinds of mud, sand, dust etc sticks to it.
I reel in while holding a cloth around the hose that cleans it as it comes in. That doesn’t seem possible with that setup (and they are advertising it as a hands-free, press the button and don’t worry thing), and in my opinion, the mud and other crap is going to build up really fast in the inside of the van, exactly where you don’t want it.
Thirdly, I don’t like the idea of cutting a massive hole in the bottom of my van.
Fourthly, I don’t like these hoseless poles, tried one and didn’t like it, and it looks like a requirement for this.
Other than that, looks good.