I am taking Serostim and am most comfortable at 3 - 3.5 iu ranges.
(3- 5 days on, a couple off) body - comfort permitting.
At this range is hardens, tighens and cuts me more than bulks me...
I have urged my buddies (that are interested) to use with longe range
goals in mind like 6 months of collective use. I have been using for nearly 6 years
(3 months on, 3 off) for budget and body considerations.
I have experimented more lately as I am (pretty well) stocked

and was really almost uncomfortable at (I know) modest ranges
of even up to 4.5 to 6 ius. Go figure . .
I weight around 195 @ 5'8" lean framed (small bone/joints)
and generally respond (well) to most meds the same
I think that I *am a lightweight*