As a happy StudioPress user of just one month, I'm totally hooked on the product (coming over from a free blogger blog...), and while there isn't a "test drive", Studio Press do have a 30 day return policy, so take it for that "test drive" for up to 30 days, and if you're not happy, you can get a refund.
I bought my domain for $4; I pay $7 a month for webhosting; the $80 Genesis + Child Theme cost will pay for itself in a matter of months if you're not paying $14 a month for the service you're looking at.
Susan @ Afford Your Passions
~ British born, Australian raised, American
~ Wife, Mother, Project Manager, Student, Stitcher, Crafter, Blogger... and now a StudioPress addict...
My blog: www.affordyourpassions.net