Beary best is decent place to stay in Singapore. Its location is very accessible and is close to most places you'd go if ever in SG (e.g chinatown, marina bay, esplanade, maxwell center, lau pa sat). It only takes you a 2-3 min walk to the train station which could take you to the rest of SG.
The hostel is very clean and the staff are really friendly. I stayed in a mixed dorm room with 6 beds. Each bed has its own locker just remember to bring your own padlock (but if i remember it well i think they have locks for rent). During my first night, we were just 5 people in the room and on my 2nd night the room was all mine. For the common room, its quite small for everyone in the hostel but packed with lots of things (TV, board games, laptops and ipads for everyone to use, BEARS). Its a nice place to hangout and meet the other guests of the hostel. Overall, its a great place to stay when travelling in a budget.
1. serves breakfast (cereals, bread and coffee) just remember to wash your own dishes after use
2. you could still use their facilities even after checkout if ever your in a late flight, you could also leave your things in their storage room if ever you decide to have last minute shopping before you leave. [made this very convenient for me since I left SG at around 11 pm and checkout is at 12 noon]
3, Free Wifi access inside the hostel
4. Re. Security - each guest is given an access card to open the main door and your room.