I would like to learn about these offline transactions. Is there a link to a thread here that explains it?
You have to do your own research for that (not completely relevant to this thread). Here are two links to get you started:
Link 1,
Link 2.
Done, thanks.
Bitcoin.org: Choose your wallet has a good overview too. It does not mention blockchain.info though. You (Lauda) also don't mention it, while it is (one of) the most used wallet(s), so I think it should be in the list, including it's drawbacks or even reasons why not to use it.
I'll think about it.
-if this would be used by many people, someone could make fake hardware that verifies okay, making it no better than an expensive paper wallet (I've seen many fake Chinese USB-sticks in the past).
If your desktop is compromised: Every wallet is not a serious wallet, but a gimmick. If your download is not verified, then your wallet is also a gimmick and so on. This reasoning is inadequate. Buy from the original manufacturer and you're good to go.
-if it breaks, you lose your money. I've had normal USB-sticks that stopped working after a few years.
Same goes for all other hardware wallets. Should I delist all of them? There's no way to determine the average lifespan of an Opendime just yet, unless they ran tests of their own.