1/ there are a number of seemingly identical ‘autoblows’ on the market. Although they are all obviously of the same template, they ARE NOT THE SAME. If you have bought a duff imitation for $30 what did you expect?  There is only one Autoblow or similar device that I would reccommend and that is the Autoblow found on sale at RoboticBlowjob.com for $99.95

2/ Unless you are very large, you have to buy the Autoblow Blast (the pink one). I have a below average length penis, but slightly thicker than average girth and I felt close to nothing inside the Autoblow Max (blue) but could easily be brought to orgasm inside the Autoblow Blast.

3/ This may be obvious advice for experienced sex toy users, but make sure you are fully erect when you put your penis inside the autoblow and make sure you have put plenty of lube both on the entrance and on your penis.

4/ This thing works best when watching POV blowjob porn! (very close indeed to the real thing – when you are about to climax, you WILL be being blown by the girl on the screen).