The Husqvarna Automower 115H is an excellent entrylevel robotic mower that does its best work on simple lawns up to 0.4acre. If you have a lot of obstacles and/or narrow corridors, a GPS or multiguide wire model is going to be a more effective way to go. With installation included in the price of this model ($1600) and a solid design, though, it’s the best option we’ve seen to test the robotic mower waters.
For more info: http://bit.ly/automower115H