I agree.
I like their story, but also like the fact that they already sell product and have sales (since 1994).
In September they begin sales of their new laser as well. No debt and positive cash growth tells me they can manage a business. Plus, I really like the the PDC cancer opportunity, although as you have said there is still a long way to go, hence this will be a long hold. I am prepared to make that commitment however.
Moreover, the President/CEO is out in front doing a lot of great PR. Check the press section of their website...pretty impressive stuff.