I must say that I am the "groomer" very enthusiastic. I am Italian and have a really hairy chest. Earlier, me can not disagree, but since I am doing weight training, I wanted to have a smooth chest.
Since growth was relatively expensive and painful and was not compatible with my skin and my wet shaving has taken too long, I found the "Groomen" for me.
And I'm thrilled. Effortlessly in a few minutes my chest is smooth. Of course not damn well as with the blade and foam, but for a Trockengroomer.
Even under the arms he does his thing very well, only occasionally I have irritated skin. But much less than with the wet shave.
As I said, I can only recommend the "groomen". (Also for the intimate area and shoulder / back).
lg
mo