Sal Studios is located in a prime location; less than a 5 minute walk from the Sao Bento train station. We were met by Filipe upon arrival, who accommodated our very late check-in and gave us a very thorough introduction to his place and Porto. He even welcomed us with Port wine and chocolate eggs for the Easter weekend.
The unit is exactly as pictured, it is very clean and bright; I believe we were the first guests to stay in this renovated room. The only 2 qualms we had were the extremely spotty wifi and insufficient hot water. The wifi is fine if you're doing very basic browsing on a phone, but it does cut in and out often. If you plan on using a laptop or to do work, it is not sufficient. The hot water tank is quite small and you'll be able to get in a 3.5 to 4 minute hot shower before having to wait 20 to 30 minutes for the water to warm up again. To be fair, Filipe warned us about these issues upon arrival and will be addressing them in the near future.
Despite this, we enjoyed our stay here and would recommend it to any future travellers. Enjoy Porto, we loved it!