I have always used softly, and have never had a problem with my kids skin when they were little,,, although i found that when thye got older and went on to normal washing powder,,, i have had to be very careful as they get eczema badly and certain detergents are terrible on their skin.
Softly smells divine, and you dont need to use a softener at all, the clothes, towels and nappies come out very soft without it.