Carlos's place Tulip was really nice and stylish, it was clean, comfortable, spacious and in a very location in Porto which allowed you to get to all the different districts of the city easily within walking distance. We note the bonus of two toilets and a very good shower were a plus!
The street door and apartment door locks are opened by use of a website / app, we personally did not like this feature as it required your phones to always be charged which is not always a given when your out an about all day and you perhaps forgot to charge your phone overnight, so its not ideal moreover, we felt it was a little big brother like and tad creepy and not very secure so we were not a fan of this and after using airbnb for 5 years its the first time I have ever seen anyone use this.
Communication for check in was a breeze and Carlos provided loads of useful information and was very responsive. There was a little mix involving other guests needing to pay tourist tax as they did not book through airbnb, better communication on this could have avoided this but it was nothing major and I doubt it will happen again.
All in all, we had an enjoyable stay at at Carlo's place and would recommend it to other others looking for a comfortable , stylish, spacious place to stay in an ideal location.