Sustanon looks good on paper, I agree, but in reality it sucks ass.
I was put on Sustanon 1ml every 3 weeks, then every 2 weeks, then every 1 week, you feel shit and the blood results shows it. Even tho it's 4 esters, it doesn't create a stable test levels in your body.
The medical community found this out, and replaced sustanon with enanthate, the best protocol to keep SHBG, Estrogen, and Test levels for optimal results is ED injections, not this is not realistic, so the best next thing is EOD injections, or the least frequency is E3D. Do that and you'll feel at your optimal physically and mentally.
Injection frequency and ester Does matter.
This is why Sustanon is not utilized anymore.
I've been on TRT for over 10 years, different protocols, different esters, different doctors, you name it, I probably tried it.
If you don't want to listen to my advice, you can do whatever you want, but sooner or later you'll smarten up.