Whether due to the low outside temperature or because the water heater had been off for some time before we arrived, but on the first night there wasn't enough hot water for even one shower. The next day, there was a bit more, but still it would run out before we were done with the second shower - and that is despite an extremely low water pressure; water trickling from the shower head rather than running. When I messaged Salvina, she suggested to keep the heater on for a few hours, and when I did so and replied that it didn't seem to make much difference, Salvina's deadpan response was that the heater had a capacity of 30 litres which was more than enough for two showers.
To be fair, things got better the day after and we finally could take two showers one after another. Still, the pressure remained low, which, given that there was no heater in the bathroom, made showering uncomfortable.
Yes, so despite heating being included to the list of apartment amenities, there was nothing except for a single portable radiant heater. We kept it in the bedroom, naturally, and the rest of the apartment remained cold throughout our stay.
Having said that, I could still agree with other reviewers who rated Salvina's place very high as I can imagine it offering very comfortable accommodation during warmer months. I only wish Salvina were a bit more clear about what was actually provided and made sure that the apartment was ready to use from day one.