I really...
Like them, have about 8 bottles (various scents). Oddly though I hardly ever use them. Due to the amount of detergents and softeners I have, I'm never sure how the scents are going to mix (never know which unstoppable scent would go with which softener).
When I have used them, I left the softener out, have used the blue unstoppables, with the blue lenor softener, but that's all.
The only unstoppables I really don't like is the gold one (called shimmer I think), it's a coconutty/suncream come tropical smell. Lenor also do a softener in this scent, and I don't really like that either.
The blue one (called fresh) is by far the best.
Let us know which scents you get.