I'm using up some bottles of Appalachian ginger beer, which is supposed to be a "Jamaican style" ginger beer and is fairly spicy. I think it might be too much for this cocktail, though, since the aged rum is going to be a bit more delicate than your typical base spirits used in most other ginger beer cocktails, e.g. mules... I'll have to try this one again with some Fever-Tree.

Since there's a lot of rum options one could use for this (and some have not worked so well according to the comments here): Appleton Estate 8 Reserve seems to handle the ginger beer well and does not get lost in the mix.

now /this/ is an excellent mule.

I made it with Thomas Henry. The result was a very drinkable, comparatively thick, intense drink. Appleton 12 Rare Casks was rather restrained and somewhat masked by the ginger beer. Havana Club 7 anos was incredibly good with coffee and caramel notes and a bit more sweetness. Go for a young rum, the indication here of 6-8 years is pretty good. And I recommend, really try it with the Havana Club 7 anos. Dave Brooms's recommends it for mixing with ginger beer in "Rum. The Manual" and he es right.

Not liking sweet cocktails, we upped the lime juice by 50%. Our ginger beer is a small-batch company and it is stronger in ginger, but has less sugar. Made a wonderful cocktail Nice strong ginger flavour and everything else is well balanced.

Loved it, but it was a bit too sweet for me. Maybe next time I'll try with 15ml lime juice.

Very enjoyable. I combined Bacardi 8yr and Abuello Anejo when making two drinks. Nice combination pairing well with the citrus and ginger beer flavours!

The rum and fruit triggers my mai-tai-dar, but with a fizzy ginger twist. Used Appleton (sorry sponsor Bacardi).