It depends on what you label "success." I can WILD when I first go to sleep, but I end up in a dreamless void, or trance-like state. My thoughts become all encompassing, and I may lose some awareness of my body, like an extremely realistic daydream. If I wait in this trance for a long time, dreams may start to appear. It is a pleasant way to meditate, but not very reliable for lucid dreaming.