Karen was nice to us, but we didn't have the key from the house, It's not convenient when you travel especially when you are not local and you don't have access to mobile internet. It wasn't convenient for us to inform Karen about the time of coming back as we had to search for the wi fi spot to do this.
We also were surprised not to find the wi-fi in the morning, when we left super early and needed to check the directions.
Also it was not great to wait for 15 minutes outside the house after 15 hour trip to Wales.
So I would recommend Karen as a host, but only on condition she'll give a key to the guests and wi fi access. People pay for the stay and expect to be able to enter and leave the premises at any moment.