Me and my friend planned a road trip from Lisbon to Porto. Thus it was not easy to pinpoint our arrival time. Lots of beautiful places to see from one point to the next, as I am sure everyone can understand. However, ORM was really flexible about this. All we had to do was confirm 1 hour in advance that we were coming (taking into account of course the guidelines set by ORM which were available on the air bnb site).
When we arrived we received a most friendly welcome. ORM also gave us nice tips regarding activities, restaurants, free parking space, etc. The appartment itself is really what the pictures show it to be. Super nice, clean, comfortable. In short it had all the requirements we were looking for. Therefore I can most honestly say: "We had a great time in Porto and a nice stay. Thank you!"