Been twice a few years back. Stayed in the Winston hotel. Heres a link:
http://www.winston.nl/
Think its a hostal, but we paid for our room tho. Dead cheap when we went. Its just off the main road running from central station. The red light district is just round the corner as well. but im not into that kind of thing.
Me mate got hit by a tram. He was standing at the side when it came up behind him. Clipped his arm. He was alright tho. hes a big lad.
Yeh those argentinian steak houses are great. unlimited ribs! thats all i need to say.
Word of warning tho. stay away from the road with the big fat black pros in. We got offered all 6 of us for 50 euros (dont know how that would have worked!) and if ya too close they'll pull u in to their booth thing. and from experience, ya dont wanna be in there.
Also, watch for the pick pockets. we noticed a few. but once they know, you know the're there, then get just get off. I just had me hands in me pockets most of the time when walking round at night.
Have a good time!