I do this all the time. I don't like it too much with the blacks, but its great with the purples.
I just go for the Americano's these days which effectively extends the drinking time for me in the same sort of way. Tried out 2 Indriya's again today - one straight and one in a cappuccino. Not bad but it had a bit of a burnt finish to it in the straight shot. Made a surprisingly decent cap though. I think this might make a good lungo shot. Probably will pick up a sleeve or two to play around with on my next order.