We enjoyed all the hotels but the one in Molino was unique. In El Calafate, the hotel was really nice, like a home, with excellent staff. But we liked all the hotels. We liked the location of the Bobo Hotel in Palermo. Staff were excellent at all the hotels. We would recommend all the hotels you chose.
Among the guides, Juan in B. Aires was excellent---very knowledgeable re history. Juan in Salta was excellent as well. But the best was Daniela in El Calafate. She was not only knowledgeable but she heightened her guiding with pictures and maps.
We liked being picked up at the airports and brought to and from our hotels.
The wine tours ( 2 was enough) in Mendoza were excellent.
The tango show at El Querendi is fantastic. Also, the night before we took group tango lessons at the Armenian centre near the Bobo Hotel. Highly recommended. Crowded with local people of all ages. A lot of fun.
In El Calafate we rented a car and drove to Mt Fitzroy where we hiked for 4 hours. Not to be missed. Even the drive was interesting. In Cafayate we had a great moderately difficult hike in a gorge, well worth doing if you are moderately fit. The guide, Franco, was excellent. The side trip to Colome with the James Turrell museum should not be missed.
We were not happy about the flight situation where we had to go to Mendoza from Salta via Buenos Aires. It was a long waste of a day. Also in Mendoza we would not recommend a whole day drive to and from the highest mountain in S. America Aconcagua. We would have liked to have spent more hours hiking. It's not an essential to see this mountain but hiking in the mountains a day would be far better.
Re your organizing of the trip, we were worried when suddenly near our departure date after paying the final instalment you told us of a change of plans. It made us doubt how trustworthy you were.
All in all this was a wonderful trip for us. We spoke a lot of Spanish. Other than the flights as mentioned and the day trip to Aconcagua we had a great time.