It's really quite pretty. Nice design. I give it a big

thumbs up.
And I like the idea of putting it on Tshirts. Now, I can whip up something equivalent in CorelDraw, no problem; and there are others here who could do same in AI or whatever. I'm not sure I can make it as pretty, though, and I'm not sure I want to steal this guy's idea.
Still... $30 for a poster, well, I don't like it
that much.
It's technically a screen print. $30 for a quality screen print is about standard. Looks like a nice print, too.