Personally I've only run it for a little over 7 weeks at 75mgED (4g pelets, homebrew) and if I would have had more around I would have kept going for the remaining 12 weeks of my cycle. I just didn't know how well my body was going to handle it my 2nd time around. 1st cycle with it was about 6 weeks and I did notice some side effects, night sweats, insomnia, increased aggression, but nothing that I couldn't deal with.
The 2nd cycle I decided I'd run it til I ran out with Test Ethn and Anadrol. I don't know why but the 2nd time around I didn't notice any of the side effects that I had before. Never really felt shut down, although I was running test, but it didn't really enter my system for a week or two and my libido was thru the roof. Even on fina alone for some reason my libido was very, very high. I loved the sex on it as I could stay hard for hours and orgasm seemed to be harder to achieve. Sometimes it would take a good 30 minutes when all I wanted was a quicky!!!! I prefer ED vs EOD it seems to keep me more stable. I'd say just let your body tell you whats up and keep the length moderate.
Viper