Started weighing 188 with about 18% bf (long layoff from the gym due to work and a home renovation). So for 4 weeks I'm down 10 pounds but more importantly down about 4% in bodyfat and gained back alot of lost muscle. So I was initially taking in around 2300 calories when I started, now I'm usually taking in around 1900/day. I think the hardest part is trying to get enough good fat in throughout a very busy workday. And of course those first few weeks its really tough as your body adjusts to switching into ketosis.......after that though its a piece of cake and I don't have the crazy cravings anymore.
My body responds rather quickly once everything is dialed in. I had never tried Epi before though and I really like the compound. No shutdown (although I pulse it) and dry lean gains.