These aren't the flashy "texture, flavoured, vibrating, extra large" kind, but they do the job you're wanting. I've had problems with the free condoms from my college's planned parenthood snapping, which is horrible to think about. So I started buying these, which have failed me once, however, this was due to her accidentally nicking it with her tooth so the condom was not to blame. These have kept me safe and pregnancy free.

One of the biggest features to me, though, is that it doesn't have lube already on it. It allows you to avoid worrying about taste or if the receiver is allergic to the lube. It lets the safety conscious give head without having to deal with the taste of the lube, or add whatever flavor they wish.
The lube on condoms never really does it for me and I always find myself adding more anyways.

I've had some slippage, and a couple of instances where the condom popped off (once or twice in the same session), so like any condom, make sure it's on snugly and be careful when you pull out; especially if you've already come.

I also use them to keep my anal toys clean; since it's easier to take the condom off than it is to wash the toy. I've tried some of the lubed condoms, but these just leave a more noticeable odor and require more lube anyways.

They are Latex, so make sure neither you nor your partner is allergic. If you or your partner notice reactions or rashes, I'd definitely have that checked out; it could be an allergic reaction, or it could be something much worse. There are alternatives out there for those with allergies, but personally, being without these allergies, it's hard to beat the price and versatility of these.