We stayed at this property for a week, 2 adults, 2 young kids (1 and 3yrs old). Bad bit first, the flys! The rental is situated on a Normandy cow farm. I come from farming stock so I was not particularly bothered however my wife was. The flys are specifically in the upstairs hallway. They are not swarming about just dead. We went in October so I guess summer could be worse. Water pressure in shower could be better.
Other than this it is a lovely part of the country, in a very quiet hamlet. The house has everything you would need including bedding and cot if required. Note there is a washing machine, it’s in the cellar. I’m sure walking/cycling in summer would be lovely. You would need a car (2hrs from Eurotunnel). The farmer and his wife are non English speaking but happy to gesture and listening to Franglais. They are lovely, even baked us a cake!
Surrounding area you have Rouen, Amiens and Dieppe ( all 45 mins away) worth day trips to. There is a great little zoo in Amiens for younger kids. We would definitely go back, but only as a short stay up to a week.