The "Climax control" is a novocaine coating on the condom, which desensitizes the penis. It works very well, enabling the man to sustain intercourse for tens of minutes rather than minutes.
The only drawback is the unpleasant taste and touch (on fingers) of the novocaine liquid coating.
I actually used these "extensively" (forgive the pun ;-) and they do work pretty well.
Without a condom I have to practice the stop&go method to avoid climax. With the Climax Control I can just keep pumping. Indeed, you feel your penis somewhat less after the anesthetic starts to work, but I prefer to see my lady in ecstasy for 40 minutes vs. being myself ecstatic for 4. It did happen for me to not be able to ejaculate when I used another condom on top of the Climax Control (she was a bit paranoid).
Another nice side effect is that after, say, 30 minutes, your penis is desensitized and you can take off the condom and go in "naked". The climax delay still works!
Beware that the amount of novocaine may vary among condoms. Some can have too much and can make you go limp. Tough luck, but generally, they have pretty good dosage. You'll try another one next time anyway.
