Everyone talks about the Clarisonic, but what if you don't want to pay £100+ and still want to try one out? I picked up No7 Facial Cleansing Brush when it was only £15, plus it was with my Boots points. I've tried the Clarisonic once so I can't compare them properly, but looking back, there's basically no difference.
To use the No7 Facial Cleansing Brush, I apply my cleanser of choice to my face, which is currently REN Rosa Centifolia Cleansing Gel*, before putting the wet brush onto my face. It has two settings, medium spin and a fast spin, but I usually stick with the first setting as the faster one can be a little harsh. By combining the cleansing brush and the cleansing gel, it gives my skin a deep clean. People can sometimes break out by using this, so I haven't used it more than twice a week.
As well as giving my skin a deep clean, it gently brushes off the dead skin on the top. I started to use it when my skin was becoming a little flakey and the brush exfoliated it off. I don't use it for more than a minute at a time, so I don't agitate my skin. Not only has this helped exfoliate my skin, it has helped improve the overall texture of my skin, as it does become a little rough along my jawline.
Just make sure you don't use a foaming cleanser with this, or else you'll end up with a bit too many bubbles.