I was at my wits end with my new rescue puppy chewing things and thought this was worth a try. I hadn't tried cherry flavour before and it works. He doesn't like the taste at all. You have to apply it every day to what they like chewing (in his case his plush bed). Definitely worth a try.
My only grumble is the spray was put in a box with a big sack of dry kibble dog food with no packing round it and it had leaked a bit in transit.