The hotel "Rochester Calafate" is great, it is located a few kilometers from the center of Calafate city, but it has a transportation service that commutes you from the hotel to the center since 17 PM to 23 PM, in intervals of 30 minutes.
The first thay, we had few time because we arrived at 14 pm, so we went to the Lake to stay a while seeing the landscape and taking some pictures.
The real magic started the second day with the "Rios de hielo" tour. A catamaran goes through the Argentinian lake and takes you to Upsala and Spegazzini Glaciers. Before arriving to this explendid glaciers, you will see great icebergs all over the surface of the lake. Really awesome.
Well, here you have a small picture that represents the landscape we could see there, it is fanstastic.
The third day, we did a tour to Perito Moreno Glacier, called "Minitrekking". It allowes you to walk 1.30 hs over the Perito Moreno Glacier, and after lunch, you can appreciate the fantastic Perito Moreno wall with its small collapses. The sound of the ice falling over the lake is incredible, it sounds like bombs. Imagine when the glacier has the real collapse, it happens every three or two years (check it out in youtube)