I only gave this 1 star becasue when it is shown - the bottle is full right up to the top, including the dispenser. When mine arrived it was only just over 3/4 full. I did not expext the dispenser to be filled and understood that this amount of liquid would go back into the bottle (when purchased). BUT I did expect a reasonably full bottle. I wrote them and told them this and also stated that it looks like mis-sales rep. and if all the bottle look like mine, then this is what they should show - not an overful one.
Have not tried the product as yet as I had some of the cleaner that the caravan people gave me, left over. Will come back next year when I have had a go with this. I just hope it's better than their attitude when I contacted them.