Sebastian kindly met us 2 hours earlier than the check-in time which really helped us out. Perhaps because of this, he might have rushed the explanations a little - the description of the city was great (including a top tip about Casa Matias), but when we returned later that night, tired and exhausted, we found that the boiler was off and we had no idea how to start it, and there was only a sheet on the bed with no duvet. By this point it was too late to call Sebastian as we were tired, so I googled how to turn on the heating. There was also no teatowel in the kitchen to wash up with.
Next day though, we told Sebastian about all these problems and he was super responsive, heading round that morning to fix all the problems. There was a duvet under the bed, we just didn't realise the whole mattress lifted up. This is the reason we are leaving a 5 star review despite a rocky first night; the host was great and I'm confident he'll fix any problems.
One last note, the kitchen is pretty tiny - it's fine to cook a simple breakfast, but we wouldn't recommend it if you are planning on saving money by cooking yourself - better to take advantage of the great restaurants in the area.
Aside from that, it's a really nice little place.