I've tried them, and they're nice, but for the price the longevity isn't as good as I'd have hoped.
Apparently there was a TONNE of hype for Pacific Rock Moss a year or two back, and that really helped get the brand international attention.
If I want a citrus/floral with a coastal vibe, though, I'll reach for Falling Into The Sea by Imaginary Authors.
Having said that, Dimitri from G&B is a really nice bloke and the perfumes are still quite good.
How many mls are the sample vials? Truthfully, I think the full bottles are overpriced by a good $50-60 or so.
For $229 there are much better frags out there - I'd go a Histoires de Parfums, a Frapin, or a combination of a few less expensive bottles.