Because of my rampant facial dermatitis, I really only saw facial improvement after maybe six sessions of laser removal. At that point, the improvement was clear and my complexion was much lighter in color facially, as well as everywhere.
I attempt to mentally reconstruct effects under different usage amounts and protocols but I do think that hair improvement came very early after using Biestro but it wasn't noticeable to anyone else and it had to do more so with the hair having a bit more body and being able to grow longer. It still wasn't attractive and I note on my blog, that I had a hobo aspect from not cutting it. My dermatitis in said pics is acute. Here, about one third of the page down, one can see what I looked like in 2016 during a phase where I had greatly decreased my use of Biestro:
I have what I feel are many useful hair and facial pics and to the extent that anyone is interested, please let me know, especially for those attempting to predict or who feel that they might be mimicking and therefore on the correct path forward. My two cents is that all males are more attractive and far younger looking after beard removal. This probably isn't seriously contested by anyone. One of the things that distinguished younger looking non-MtFs is often the lack of visible beard growth. Beard growth, furthermore, is not purely digital, meaning that it increases often in terms of thickness, sebum production and growth rate and length. Indeed, white males often see a sustained and consistent increase in beard growth post-puberty, in terms of thickness and ability for the beard to grow long that can continue over decades.
Note how this in many ways seems to be the inverse of cis-females but females tend to carry more hair in terms of measured weight than beard growers but we all have seen some extraordinary individuals with beard growth that is substantial enough to be compared to cis-female scalp hair growth.
In terms of analyzing temporal constraints for hair improvement, that is a perplexing question and a very important one for non-MtF's if not the most important. Are hair results linear, like beard "improvement" or are they rather more "digital" in essence and only occur when circulating estradiol meets adult female targets? Or is it a blend based upon some hair receptors being marginally more available than others to increased estrogen levels that don't meet say Wpath targets?
My current thought is the latter meaning most people might see hair improvement even when using amounts of estrogen that are barely effectual for feminization and this effect might be maximized via local effects using topical estrogens. To actually "regrow" substantial amounts of hair and achieve hair with the appearance of a caucasian female's, however, then we might be more so in digital territory where the best method would be to hit targets as soon as possible, and that it is this, that actually "turns on" hair regrowth epigenetically. While all estrogen methods seem to work essentially the same in terms of feminization in the longer-term, some, like injections, can apparently propel a person into the hormonal levels of an adult cis-female in as little time as two weeks. Using premarin in the amounts that I was using can be just as effective or more so in the long term as titrated upwards but it can take a really long time to get there, often more than two years, if at all. This is where the AA's tend to show their utility temporally.
We don't appear to have many syringe users on here but their experiences in terms of how quickly they met initially adult female hormonally levels is of great interest. Syringes are a bit advanced though although very cheap and few MtF's start off on I.V. ingestion methods.
So, as a TL

R for cis-males using or hoping to use female hormonal medications to improve or restore hair loss without excessive feminization, the hope is that some intermediate level of E2 and T can be found that effectuates the greatest hair improvement possible while not feminizing excessively. My feeling is that this is more likely to be possible in a hair maintenance context where estrogen is used on the scalp in conjunction with a reductase inhibitor or perhaps an AA. It might be possible to establish a "rule of thumb" jumping off point for cis-males, aside from the no estrogen at all fear where one could get to the region that best maximizes an individual's overall self-perceived utility in terms of both "maleness" and hair.
Even more so on the plus side in terms of looking at things is the idea that this gives all of us two different bites at the apple. First we can try an incremental approach to increasing estrogen levels and then if that is insufficient, a person can then implement an ingestion method that will quickly reach targets like multiple patches or using injections.