In my experience, even while using tren during my 2-on cycle, and no HCG (due to logistics) and using 40mg/day tamoxifen week 1, then 20mg/day week two, then nothing last two weeks. So 2on 4 off
Recovery was full and complete, libido was robust throughout, balls were bigger than ever, insomnia quickly abated. Gains depreciated by week 3, but when 2nd 2on/4off cycle was begun, "gains" (i.e muscle fullness and strength measured in terms of weight lifted in the room in which you lift weights, eh a gym) returned dramatically by end of week 1.
I carefully logged this.
I kept most of it after 7 weeks off following surgery (where little training was done) over the summer, kept "msot" of my strength, and now am doing realyl well on start of new two week cycle.
I love these cycles - although i miss the RABID libido of my first cylce earlier this year which was a 6 weeker.