I had ultraformer hifu done before and this dualsonic is almost the same exceot for the energy level differs form the clinic ones but it's still very good. I use level 4-5. My favourite is all the 3 dept 1.5mm 3mm

4.5mm.

My skin felt smoother and brighter with 1.5mm use and I fell addicted to use it like every alternate days.

My neck felt tighter with the dual 3mm and 4.5mm use. This product is really 5 stars. I have no regrets purchasing.