For the positives: it's cheap, the location is great, the internet is very fast, you have a lot of useful stuff in there and communication is very quick.
Negatives: it's tiny. I mean, minuscule. I am 180cm and quite slim, and in the bathroom, I was not able to move around without hitting myself. My toothbrush slid from the shelf under the mirror and fell down the toilet because there is no space between the two.
But the worse of all is IT'S COLD. I mean, FREEZING cold. And humid. I was there in March and it was 14C outside. Well inside it was probably below that, because I was cold despite wearing ALL my sweaters and the jacket indoors. The AC there was making a terrible noise, but apart from that it was also not helping. I had it on, but it was still freezing cold inside. I was planning to work a bit from there, but my fingers were so cold I couldn't type.
When I asked for a heater for the next days, I was told that they don't have any, and I was suggested to look for another place (at 10 pm in the evening..) Good thing, I was reimbursed for the nights I did not spend there, but in fairness, I don't think I should have paid for the first night either, it was torture.
Bottom line: if you are a tiny solo traveler in summer, it can be a fantastic value for money, but in my case, it turned out to be a disaster.