We stayed a week with Martin & Anita and found the place basic but clean enough. However, when it came time to pay Martin charged 10% for credit card and then bumped the price up again with an appauling US$ exchange rate! It would have been cheaper to stay in a hotel of a much better standard!! Martin managed to time our check out with only an hour to leave, so we had no option but to pay. I would strongly recommend people to take US$ to pay with.
I wouldn't recommend Martin y Anita's Hotel to anyone travelling to Easter Island.