I had treatment in 2 deep frown lines and a wrinkle (not deep) across my forehead. It was really painful, like having lots of bees sting you. The treatment was over within a couple of minutes, thankfully. I'd recommend a numbing cream as this may help. I bled a little but had no bruising, although everyone is different.
I was told that I'd see at least a 60% improvement in my frown lines. I haven't. I don't see too much of a difference. I emailed the clinic, noting my disappointment. The clinic hasn't even been courteous enough to reply. The lady, Fiona, was quick to get back to me initially when I asked for a price however. Due to this, I will go elsewhere next time.
I'd also like to add. While the dentist and Fiona were pleasant enough, I got the feeling that I was just a £ sign. There were no pleasantries exchanged and I was ushered out quickly because the next patient arrived. It all felt a bit odd.