The Swedish 1-m Solar Telescope has been operating on La Palma since 2002. Before that, the Swedish solar observatory hosted other solar telescopes for almost 20 years. From this experience we will formulate a number of conclusions that we believe are relevant for the EST.
These points will touch upon telescope and instrument design, telescope operations, and the science that could or should be made with EST.
Finally we will try to answer the question “When is the seeing good?”