What does coffee leaf tea taste like? I have recently seen leaves of the coffee plant for sale for the purpose of making coffee leaf tea and I'm curious. What does it taste like?

I've heard various bold health claims about the antioxidant content, and that it has very little caffeine content (e.g., treehugger, modern farmer, and The Telegraph). It also sounds like a way for coffee farms to make some "off-season" profit, which is probably a win for everyone.

But what I'm interested in is the taste. The Wikipedia article (linked above) says it tastes like "green tea" but that's extremely varied, and others (like the link below) describe it as "sweet" or "refreshing" or "dry" but none of those are particularly helpful either.

I have only seen this one place selling the stuff and they seem to be perpetually sold out, but maybe it's highly seasonal. 

The leaves seem to be sold for $20 for 50g, or about $180/pound (since they're in Canada, I assume those are CAD/C$). Maybe it's like conventional tea, where even a gram goes far, but I don't know. Before I shell out that much, has anyone tried the stuff? What does it taste like? How is it prepared? If it's like a tea-like coffee, that sounds delicious. Perhaps like cascara or similar?
Had once, made of dehidrated leaves. Lighter than green tea, it ressembles rucola (arugula, in the US).