I use the E300 for my hrt to match my prescribed dose. Costing me more for my regular so this is a great sub. It has for me no pip which is refreshing for how much hormone per mg. I have not had any drop in libido or rise in estro fron the last few batches and my last bloods on roughly 125 put me at 1125 total test. It does the job.
Now I never tried test base in oil, I used water based and the burn was intense. With the oil base I still get a feeling of a bee sting but it recedes after about an hour and then I hit the gym. It certainly changes my mood and gives me more of a feeling of hitting the weights harder for a change