I grew out a five pack of Vanilla kush. One didn't germinate, two didn't start flowering after 5 weeks of 12/12 so I threw them away. I managed to take 2 plants from the five pack through to completion. One was a very average sandalwood scented short Afghan I would have rated as B- being generous; the other however was a tall stretchy Kashmir dominant with amazing smell and flavour, proper A+, best Indica I've grown.
So, my advice would be that you're taking a risk with it - but the rewards are there if you find the right pheno. Just be prepared to be disappointed.