I stayed 3 nights at Rucksack Inn and thought it was a great place. The staff and other guests make you feel right at home as soon as you arrive. The whole place smells of lemongrass and is really refreshing after a long day of travel.
I stayed in the big 14 bed dorm and I was worried at first, but it was great. Each bed comes with its own lamp and electric plug. The beds all have a basket attached to them so you can store your phone, etc. overnight. This is great for people on the top bunk. The rooms all felt very clean, too. The locker was big enough to hold both of my bags.
There were only 2 toilets and 2 showers, but I never really found myself waiting for those.
My only complaint is the laundry. It cost SGD10 per load, which I think is way too expensive. It was nice to leave and come back to clean, dry and folded laundry, though.
Overall, a great place to stay with knowledgeable staff and guests within walking distance of Little India.