I came across this at the London Marathon exhibition. I'd not seen it before but it rang a bell. I remember that Ali (a dietitian) had written in general terms about the cycling team using a cherry drink during their training for the last Olympics so it pricked my interest.
They market it as a recovery drink and suggest it helps to prevent delayed onset muscle soreness. I bought some at their special offer. I thought it would be a very pleasant way of taking in the necessary carbs to prevent me having a delayed onset hypo after a long run. I hate eating anything then and it might actually do some good, As you dilute it, you don't actually have to take the full 30ml dose.
I have to say I was able to walk normally the day after the London Marathon and do a short run on the Tuesday. Might or might not be coincidence. I haven't run any long runs since then but I also think it would be a pleasnant drink to take, well diluted, on a long run, supplying some carbs but not the horrid taste (and artificial ingredients) of some other products.
I certainly haven't investigated their other claims for using it as a general health drink.
I did note on the website though that they make it in tablet form without the carbs and they suggest this is a better form for people with diabetes.