Locals please give me your opinions on these apartment listings.

Hia
Ambientes is confusing, it means main rooms, so dos ambientes means a living room and bedroom, tres ambientes means living room and two bedrooms etc
I would presume the bills are not included. If you can come over and then find a place it may be easier.

Good luck

Thank you Chaz!

Can anyone tell me what Belgrano's like? I am finding some affordable 2 bedrooms there.

Belgrano is a very nice neighborhood, but typically about 20-30% higher in rates than other locales such as Palermo.

Dormitorios refer to bedrooms, so 2 dormitorios (or dorms) refers to a 2 bedroom.  Ambientes refers simply to rooms so a 2 ambiente will have a living room and 1 bedroom.

The listing you have above do not include utilities and seem to be normal porteno rentals meaning they will require a 2 year contract, a guarantia, a deposit and possibly a rental fee.  To get a shorter lease it is required you either be a tourist or diplomat, so as a newcomer with no residency you would qualify for a short tem lease, but the price will go up by a considerable amount, possibly twice as much or even higher. 

Also those  apartments are not furnished and you will find furnishing are quite expensive here, low quality by USA standards, and do not lose much value used so it will be quite expensive to set up.

I only looked at the first 2 listings you included above but both are in Nunez, the furthest barrio to the north before leaving Cap Fed and are outside of subway range and taking a bus will take some time if interested in getting to town and taxis will become way to expensive that far out.

I like Belgrano a lot, you can take the Subte to Recoleta etc but it is definitely a bit out of the way as far as not being in the "heart of the city" ..
I don't know about rents but the housing costs for buying are better than in Recoleta in a lot of cases.
Renting an apartment long term here is going to be a bit tough .. I think.
As Wynn says, you need a DNI to rent long term, it will cost you more as a "foreigner" and they are not only not furnished but often have no a/c or appliances. People bring everything with them when they move here, right down to the refrigerator.
And all of this really requires someone speaking and understanding Spanish. The farther you are away from the Touristy City barrios, the less English will be spoken.