transdermal testosterone is certainly far less efficient than injections. but when you get prescribded a sufficient doseage and you use it correctly, you get 24/7 elevated levels of testosterone, even getting to above to normal range if you use enough and apply it correctly to the right location.
personally i spread out my 4 pumps per day into 4 different applications. and i slowly rub in the transdermal all the way untill the skin is dry to make sure i get as much as absorption as possible each and every time. i use 1.62% gel, which is 20mg of test per pump. so i get 80mg per day, but transdermally i only absorb maybe 10-20% of it. but still, that would put me on the upper end of the normal range. and it certainly helps me keep onto all this muscle. hell im even improving and i havent been on gear for over 6 months now.