we recently stayed at the postales argentina hotel in chacras de coria, and we can't say enough good things about the friendly and helpful staff.
not only were they helpful with all the basics, like calling for transportation, or suggesting activities in the area - they were able to call a doctor to come to the hotel when my husband developed bronchitis. really above and beyond service.
the hotel is just down the street from the small downtown of chacras de coria, and it is a quick walk to several shops and restaurants. it is very quiet there, which is a nice change of pace from downtown mendoza.
we were a little disappointed that the outdoor swimming pool was not operational while we were there, but other than that, it was a cute place to stay with great service.