Application:
I flashed initially on 4-5, 3-4 in the bikini area. It does not hurt, but can cause a short tweet by high heat at a high level of "tender" points (knees, bikini line). Meanwhile, I flashed all at 5 without tangles.
At level 5, the season lasts until next triggered flash longest, about 3.5 seconds. You can watch your area to be treated calculate (legs as cylinders of average diameter) and 2.7 parts (surface of Lumea 3x0,9 cm). Then you know how many flashes are needed and believe me, there are many. I have very slender legs and still need each leg about 20 minutes. This is due to the charging time until the next flash follows. Also you should easily work overlapping, ie, always advancing 8 mm.
But I can make this long procedure at a time where it fits.
The flashes are bright, but I wear this no sunglasses, it does not bother me very much. The fan noise I feel as quiet.
Conclusion: For me, an absolutely worthwhile purchase.