FYI - I just got this in today. It is 33,000 EBC (~16,500 SRM), making it about 4 times as dark as Sinamar. The bottle states that 6mL will raise 100 liters (~26 gallons) by 2 EBC. In other words, my two 250mL bottles are approximately a lifetime supply.
I will probably be using insulin syringes to dose this stuff in bottles at first. It smells good, just like I'd picture burnt caramel would smell. The smell definitely calls to mind certain English ales (Old Peculier, for one). I might have to buy a sixer of Bass to do some initial taste-testing soon rather than waiting until I can make time to brew a full test batch.