The interesting thing about this technology, is that it's a way to bypass the rocket equation - in theory at least. There are a lot of practical objections, not the least of which is the fact that they've had to add so much heat shielding that it cancels out the gains of not needing to take so much propellant. But maybe they can work around that at some point.

The practical problems make me skeptical, but the potential advantages make me hopeful. To all the skeptics out there : remember that people were also skeptical when SpaceX said they wanted to land their rockets, yet here we are.

“People who say it cannot be done, should not interrupt those who are doing it.” - George Bernard Shaw