Once you've got your technique right, an inward rolling motion (there are tutorials on youtube but it's very simple), it's very easy to use.
When you're yanking hairs out of your face by the root it will never be painless but it's the best method for me. I was concerned that wax strips would give me wrinkles over time, bleaching still gives a hairy profile, a friend of mine developed darker pigmentation on her face after using hair removal creams for decades which scared me (also I hated the texture of my lip after using them), and plucking is time consuming. So the little removal spring works best for me 