Ektar is quite accurate outdoors. Probably the most accurate color film I've ever worked with. But you do need to understand it. It needs to
be balanced for color temperature because it doesn't artificially warm shadows like a portrait film does. Under an overcast sky, use an 81A filter. For deep blue shade, use an 81C. For high altitude or minor shadow control, use a pale pink skylight or 1A filter. Simple. And it needs to be properly exposed, just like a slide film. Know how to use a light meter. What's so hard about that. Even Aunt Maude in Peoria knew how to put on a slide show on her white refrigerator door. Nowadays the mantra is just wing it, then try to correct the mess in Photoshop afterwards. Garbage-in/garbage out. Do it correctly at first and life is a lot easier. But be aware that an accurate film might not be what you want if you are doing environmental portraiture under less than ideal conditions. What we've come to accept as photographically "pleasing"
skintones can sometimes be at odds with the true color of foliage etc. And Ektar is rather saturated in comparison to garden-variety color