Not really much to say about it - it's a bottle of screen cleaner and a microfibre cloth for 10p. Seems to be lots of stock, and it's available for "pay and collect" pretty much everywhere if your local doesn't have any. Used to be £5, then it was 97p in the clearance, now they must really want rid!
This stuff lasts forever, and is the same as the "techlink" cleaner. Word of advice, use the spray very sparingly - you don't need much. If you spray lots on it'll smear like most of these sprays.