Beware MP products. Based on my experiences with them, I think they're poorly made. I heard a rumor this is because they don't have ammonia to lift up the follicle and deposit color--so the dye just goes on the shaft and doesn't really adhere. This translates to bleeding on everything, even if you set it overnight.

That said, go for the burgundy of deadly nightshade. The pink and the wine seem like they might fade faster.