You make it sound worse than it is. Maybe it's just me, but he seemed to have some positive things to say during the actual demo. Just seems slightly staged at the end there is all. As for struggling to use the app, we don't all expect an early prototype + third-party app to have perfect usability.
Of course, this testimonial pales in comparison to, say, the Oculus Rift kickstarter video. But that product was further along at that point, and solving an easier problem.
Edit: Actually, I take that back. I didn't realize this was featured on their home page, which definitely should have a better testimonial. At least it reflects the reality of the tech at this point, setting the right expectations hopefully (in contrast to their main video).
The real kicker is how deluded the founders are about their idea. The sculpting app, for instance, is an awful idea. Sculpting in air doesn't work – it's a fundamental limitation of the model – there's no tactile or force feedback – not something that will improve with the technology. Demoing with this app shows they don't understand the nature of the technology they're developing. I would give them a pass, but, later on in the video, the guy with the beard says "so you can imagine a surface on every wall, like Gmail, Facebook, or whatever". This not only unimaginative, but wrongheaded. A moments thought reveals that this idea makes no sense.
"AIREAL pumps out tight vortices of air to simulate tactility in three dimensional space. The idea is to give touchless experiences like motion control a form of physical interaction, offering the end user a more natural response through, well, touch."
It looks like Aireal can only create a pulsing sensation, which will still be insufficient for sculpting, and I imagine it is a weak sensation in the first place, but I am still interested to see how these technologies improve over time.
https://www.youtube.com/watch?v=Cv7nSng0yD8