Yesterday I stayed in Alin's Belgian paintings room for a flash visit to Brussels. I did not stay around for long enough to write a thorough review, but I do have two observations.
First, Alin's place has a very distinct and particular feel and atmosphere to it, which might best be described as cosmopolitan and hippie-like. This could be something to take into account, especially for longer stays, as I feel that I did not quite match the vibe.
Second, the place is extremely well-maintained and tidy, and Alin clearly wants nothing more than to provide the best possible experience for his guests.
The bottom line: I would recommend staying at Alin's place if you care about value for money, but if you also identify as a "free spirit", there's no better place to go.