Our stay was so so.
Marta was quite nice and tried to be helpful. Though our rooms were by all means way too small for four people, especially four with luggage.
And the price for an extra person doesn't mean extra spce or anything, just an extra sofa bed, that is rather tiny.
And the house rules weren't known to us until we got there and until we read the book of rules in the room. And there are quite a few. If the house is packed, taking a shower in one bathroom with eight people in the house can be really cramped, especially with the rule of no showers between 7:30am to 10:30pm. And the kitchen isn't available unless you pay for use, you also have to pay for the washing machine.
Everything was rather chaotic the day we got there, and the all in all experience was alright!
So just remember to read the house rules and know what to expect!