I'm quite familiar with the area, as we own a small property in Los Reates (La Joyita area). The closest small town to that Country is Villa Cuidad Parque, followed by Los Reates. The closest supermarket, gas station and ATM would be VGB.
Valle Calmuchita is beautiful!!! Its much greener and more peaceful than the Punilla (Carlos Paz - La Cumbre) area. Lots of swimming holes, fishing spots and hiking, though the pine there is obviously not native to that area. It is a safe area, relatively free of country trash neighbors and quickly developing.
Perhaps the Countries in Valle Calamuchita have taken longer to sell because its a bit too far for a daily commute to Cordoba (about 2 hours). Most people who build in that area want to be able to rent out a cabin - a type of construction is not possible within the building codes of most Countries.
Please let me know if you have other questions about the area. I visit at least once a month.