I was on androgel for a couple months...After the first few weeks on, I had blood checked and was at 900ng/dL. But after two months on the stuff, I lost the "feel good" feeling from it, and for good reason...My T levels were WORSE than before starting the gel - dropped from just over 400 to just over 300. I suspect I was still producing some nat T at the time of my first bloodwork.
Got switched to cyp injections and no regrets; it's good shit. As someone else in this thread said, the most T you will get from the max prescribed dosage is about 70mg/wk (2 50mg packets ed).