A very nice taste, but it quickly transitions to a finish that's just a little too dry for me (for this kind of drink at least; I like myself some dry drinks in general). With a 5:2 ratio citrus to sweet, it's not surprising. I might retry this with just a hair more cinnamon and/or passion fruit syrups.
Difford has halved the syrups from the original recipe but only reduced the citrus by 5ml each, so that may be your problem. I tried his version and found it very heavy on the Ango, so I might try adding a little more syrup too.
Tried this twice. The first time, I accidentally forgot the grapefruit juice. Apparently, lime juice + cinnamon + passion fruit + simple syrup combine to make grapefruit flavor, because with the grapefruit juice missing, I couldn't tell. When I added the grapefruit juice the second time around, it tasted exactly the same, just milder. YMMV.
Made this again with Black and gold Jamaican rum. If you like the Jamaica funk, this is perfect. Went unbelievable with Sichuan Orange Beef dinner. Wow.