I grew VALENTINE this year and i'm totally in love with it. It's a strong indeterminate that just grew and produced until we had a hard freeze last week. It really isn't a cherry shape, but a grape. I can't describe it's taste as sweet, tart, or other. All I know is that it is delicious, heavy producing and does well with slow roasting. I got my seeds from Johnny's Select Seeds-
www.johnnyseeds.com There are several others with the name valentine, but this is the only grape that I know of.