My primary reason for trying these was I want to try out Vauban's Wars from the same publisher and these were suggested as appropriate for any associated field battles.
Here are a few photos from the playtest game:
Views on the rules were interesting. I liked the variability created by the card driven mechanism; however, one of the other players thought it introduced too much randomness. I suspect we both have different tolerance levels and attitudes to uncertainty. Let's see the reaction to Vauban's Wars but I would like to get these to the table again.