It would be good to have a list in one thread. The following is a list that I have used by country:
Brazil
Rio:
1. http://www.gringomanagement.com
I have rented apartments from them many times going back to 2005 in Copa, Ipanema, and Leblon. In 2005, a studio went for 45-50 dollars per night in Ipanema. How times have changed! Apartments range from dingy studios to luxury apartments. You can negotiate for a longer stay. They provide reliable airport pick-up, but the drivers speak basic English. Overall, very reliable.
2. http://www.blameitonrio4travel.com
The owner is an expat from New York. The office is located in Copa. He also owns a laundry service next to the rental office. I have exchanged money there for no fee. The owner speaks fluent Portuguese and is a good contact. I have also used some of their excursions to Buzios, for example. Overall, reliable.
Colombia
Medellin
http://www.theapartmentmedellin.com
I rented from them 2x. They provide airport pick up with an English-speaking driver. I stayed in a 2 bedroom close to Pargue Lleras and a studio close to Oviedo mall. Both apartments were clean, excellent location, and what I expected based on the pictures on the Internet site. Apartments had a washer, but no dryer, which seems to be standard. You can negotiate for longer stays. I paid 1200 dollars for one month in July of 2012 for a studio. It is considered high season.
Poland
Wroclaw
http://www.asapart.com
This agency has been mentioned before on the forum. I rented a few apartments during my stay in Wroclaw. Do not rent the one by Cafe La Musica. It is very loud. The best apartment I rented was in the Szewska building. You can negotiate for longer stays.
Romania
Bucharest
http://www.rosuites.com/carlton.html
Stayed in a one bedroom for 50$ per night in August of 2013. The location was perfect, close to Lipscani and across the street from a mall; 5 minutes walk to all the nightlife. My friend who speaks Romanian negotiated a lower price. Make sure the apartment has AC in the summer.
Ukraine
Kiev
http://www.kievrent.net
I rented a one-bedroom in Feb of 2013 for 60 dollars and a one-bedroom in August of 2013 for 80 dollars. They gave me a small discount for having rented with them before. They[/u] have many apartments close to Independence Square. Transfer to the airport was reliable. The office staff speaks English.
Brazil
Rio:
1. http://www.gringomanagement.com
I have rented apartments from them many times going back to 2005 in Copa, Ipanema, and Leblon. In 2005, a studio went for 45-50 dollars per night in Ipanema. How times have changed! Apartments range from dingy studios to luxury apartments. You can negotiate for a longer stay. They provide reliable airport pick-up, but the drivers speak basic English. Overall, very reliable.
2. http://www.blameitonrio4travel.com
The owner is an expat from New York. The office is located in Copa. He also owns a laundry service next to the rental office. I have exchanged money there for no fee. The owner speaks fluent Portuguese and is a good contact. I have also used some of their excursions to Buzios, for example. Overall, reliable.
Colombia
Medellin
http://www.theapartmentmedellin.com
I rented from them 2x. They provide airport pick up with an English-speaking driver. I stayed in a 2 bedroom close to Pargue Lleras and a studio close to Oviedo mall. Both apartments were clean, excellent location, and what I expected based on the pictures on the Internet site. Apartments had a washer, but no dryer, which seems to be standard. You can negotiate for longer stays. I paid 1200 dollars for one month in July of 2012 for a studio. It is considered high season.
Poland
Wroclaw
http://www.asapart.com
This agency has been mentioned before on the forum. I rented a few apartments during my stay in Wroclaw. Do not rent the one by Cafe La Musica. It is very loud. The best apartment I rented was in the Szewska building. You can negotiate for longer stays.
Romania
Bucharest
http://www.rosuites.com/carlton.html
Stayed in a one bedroom for 50$ per night in August of 2013. The location was perfect, close to Lipscani and across the street from a mall; 5 minutes walk to all the nightlife. My friend who speaks Romanian negotiated a lower price. Make sure the apartment has AC in the summer.
Ukraine
Kiev
http://www.kievrent.net
I rented a one-bedroom in Feb of 2013 for 60 dollars and a one-bedroom in August of 2013 for 80 dollars. They gave me a small discount for having rented with them before. They[/u] have many apartments close to Independence Square. Transfer to the airport was reliable. The office staff speaks English.