I've tried Cherry juices and found them pretty expensive and can't say they worked for me.
At the price , I probably didn't persist long enough- to be fair!
However, as this is a well documented strain in gout cure writings- I now buy only the Cherry version of those well known Muller Fruit Corners- it has 20+ gms of rather high quality cherry compote and is thus a very small 'on cost' to what would be a healthy addition to anyones normal diet.
I've often wondered why it's such a popular flavour and pleased my local Express store always stocks it.
Maybe there are more secret gouties about?