It’s OK
Works as advertised. All that’s missing is a way of typing in percentage numbers for dimmable bulbs or switches in addition to the current sliders. Maybe even preset buttons with predefined dimness levels. It’s also missing a Today Screen plugin with some quick shortcuts to the non-existent percentage of dimmness buttons ;-) Otherwise an OK app, but I don’t use it very often as DO Button, an iOS app that lets your create 3 Today Screen buttons with preset dimming levels.
chazview about Switch for WeMo