Is it true that it is difficult to use 2 component products such as LATICRETE® 111+LATICRETE® 73, compared to single powder product mixed with water?

Not true. In fact it is easier with two component products as there is no water mixed at site. The performance of single powder product depends on the quality of water mixed with it. Many times the water quality is bad in building sites and contaminants in it affect the performance of single powder adhesives.