I had a great experience with Cloudberry Vapors. I placed an order while they were offering a very generous promotion and it came lightning fast with some nice personalized touches. Their juices remind me of what you could order from a downtown breakfast cafe; there's SIX heavy desserts, a cereal, some fruit-mixes, and even a coffee flavor!
Their price point is on the premium side, which isn't a problem in and of itself, it's just that their sample packs aren't so much "samples", they're "bundles" where you get a discount yet the bottles are still full-size. I think offering true samples would be a boon to business for them and would help potential buyers take the plunge.
The flavors I got were well crafted and I'm very willing to give the others a shot. Recently they've been quite promotional so I'd take advantage and try them out for yourself!