Some points for successful install:
1.) Shave.
2.) Make sure that you are fully in the condom. You don't want a space between your head and the end of the condom.
3.) Use the Rochester wide band rather than the other ones they offer. The adhesive they use on the wide band is stronger.
4.) After you have the condom on, grab your penis and squeeze to make sure the adhesive bonds well. Don't get carried away, one squeeze is enough to set the bond.
5.) Cut the end of the tube that extends from the end of the condom; the remaining length should match the end of the barb on the p-valve hose.
6.) You might be between sizes. If the condom is slightly big for you, it will be easier to put on, but may blow off easier. The opposite is true for a condom that is closer to your size. Order a sample pack and try different sizes.
I put one on before leaving the house. At the end of the day, it's much easier to remove. Try that out, if you are having removal issues.
Cheers,
Mitch