There is a pro to short acting esthers that I don't think is scientifically documented... but sure seems to be the case from first hand experience - They seem to work better.
I'm currently taking:
100 mg nandrolone phenylpropionate EOD
100 mg test phenylpropionate EOD
100 mg test propionate EOD
and I just finished about 8 weeks of 100 mg whinny ED with it.
I've been on for about a year and a half. Last summer I posted heavily about bringing my size down to about 210-212 lbs (from 240-250)... and over the course of the year I've brought my size back up.
In the last week or so I've been tipping the scales at 250 lbs.
Now throughout the year I've been on d-bol, test, deca, EQ... etc... and I've only been on the short acting esthers for the last 12 weeks.
I definitely feel I've made my best quality mass gains on the short acting esthers.
I will get my bodyfat tested shortly... but the thing that surprises me the most is that I've brought my size back up to 250 lbs at a significantly lower body fat percentage than I was at a year ago when I started to take my size down.