Excellent location which is close to all amenities but on a quiet road. Small InCoop supermarket only 5 minutes walk away (beware afternoon closing hours). Despite being told initially that they keys should be collected in Portoferraio, they allowed us to collect the keys and drop them off it at an agency office in Marina di Campo instead. The agents we dealt with were very helpful and spoke good English. They allowed us to check in earlier than the stated 16:00 time. For the two bedrooms we needed, the base price of Casa Carlotta was half the price of staying in a hotel in the same town, but beware the extra cost for bedding & towels. We didn't experience any problems with a lack of hot water mentioned by another reviewer.

Check out time of 08:30 to 09:00 is rather early. The mattresses weren't the best, but we slept OK. There is a TV but it is located in the dining area, rather than in the living room. We booked via the website, and this didn't inform us in advance that the keys should be collected in Portoferraio and not in Marina di Campo. We found later that the Android phone app does say this, in the "Policies" section.