Decent value for money - breakfast, lunch and dinner included in the price of the stay.
The quality of the food served varies between each meal. If for example you get to breakfast either very early or very late, be prepared to be disappointed. However I had several genuinely good lunches and dinners here and they have a decent array - including vegetarian.
Yes the son of the owner is on the desk quite a bit and speaks limited English. The owner friendly but again seems to speak no English. Both are quite willing to help when you're able to conduct a conversation.
The hostel is quite homey with lots of nice touches - including the towels made in to shapes (swans, flowers etc).
A room with a double bed will feel really cramped if shared with another person (I shared with a friend one evening until she got her own room the following night.) However the room size is sufficient if you are on your own.
Should be a minor quibble but the decor/layout is bizarre. One wall of frosted glass out on to the corridor. There's a curtain for added privacy which doesn't quite cover the width of the window. Similarly the en suite bathroom has a hole in the shower wall about a foot squared (for ventilation) right at the ceiling - again the corridor is on the other side which throws up a few questions about privacy.
Though it should be taken in to consideration that an en suite in a hostel at these prices is really quite good.
Brilliant location. Pizza place and convenience shops right next door, bakery on the corner (the bakery is definitely worth a visit) and is right over the bridge from the market and train station.
I stayed in several hostels during my time in Peru when trekking the inca trail. Viajeros was definitely one of the better ones and for the price and value for money I dare say I would stay there again.