Once you are on the street, it is really not hard to find the building. While the sign may be small, the number 17 is clearly marked, as are the numbers on most of the surrounding buildings. I emailed a couple of times in advance to let them know when I'd be getting there, and someone was there to meet me, but it is true that there is often nobody in the lobby area. However, they claim to be reachable by phone 24 hours a day (I didn't have to try), and able to get there in minutes if you need anything.
Things I liked:
Coffee machine right outside my room - great cappuccino for .5 euro, also sold bottle water and a few snacks
Comfortable bed
Everything clean - daily housekeeping
Great pizza right downstairs
Window opened
Free internet
Free international phone calls!
Things I didn't like:
Very noisy air conditioner
Tiny shower
The room is very small and simple. There is a closet with a little hanging space and shelf space. It was fine for one person, but would have been crowded for more. However, I believe they had larger rooms. I've read different reports on the internet about the total number of rooms - several said only three. I was on the first floor (one up from ground level) and there were four rooms + lobby area on that floor of the building. I was told the hotel also included another four or five rooms another floor up.
Due to the couple of things I mentioned I didn't like, I do not think I got a great bargain. I paid 80 euros per night, which was comparable to what friends paid for more full service hotels, with breakfast, in the area. For me, the location of the Pollon Inn was the main attraction, because I was participating in an event at the Palafiori (convention center) literally less than a block away. I did a lot of walking back from friend's hotels in the evenings, and it felt like the streets were very safe, in keeping with what I was advised.