I have bought from Best Fijian several times and it always went well. I actually recommend to people their Fijian Lawena to have on hand as a mixer, especially for when you want to drink a kava that is either too strong or too heavy for you to drink straight at the moment. You can blend down with the lawena also while adding taste. It's also just fine completely on its own now and then as a treat. The others are merely ok. The Waka is fine and you can certainly get a good krunk on with it, but there's nothing really special about it that leaps out at you. Still, it is generic Fijian waka and Fijian waka is good, so it's good. It's just not top shelf by any means. As for their service, just fine. They've been in business for a long time, they deal mostly to Pacific folk in the US, and usually in large quantities. Heck, I usually buy large quantities from them. They aren't really a boutique operation. Still, I have now about 8 lbs of their lawena in my pantry and I'm glad I do. It gets used regularly and the price is fine, in comparison to the general market.
Learning to navigate their web site to find the product you want in the quantity and price you want is an art form, not really left to amateurs. Also, Many folks resell their stuff at a markup, esp on eBay. I recommend only buying Best Fijian products directly from Best Fijian, using their impossible web site. The staff are pleasant and seem to know exactly what they are doing.