The best 1-Test product I ever used was Super One + transdermal. It was a mixture of 1-Test and 4AD. I got very nice gains with no noticable sides. The libido was a little low, but that's about it. The 4AD helps you retain a little water which is good for the joints and
strength gains when on this stack.
I've also use Boldione from Molecular Nutrition. I usually do just a little 21 day cycle to get some strength gains.
Ergopharms 1-Ad is a good 1-test product. Most people feel lethargic when taking 1-AD so it's kind of hard to get motivated, but I've had good results with it.