I would say - overall, it is good.
The good part of it is the cold wallet is offline, therefore if someone gets access to the cold wallet they will be unable to access the bitcoin.
The bad part is - since it is offline, there is no way to know how much bitcoin is in the cold wallet.
The good part of it is the cold wallet is offline, therefore if someone gets access to the cold wallet they will be unable to access the bitcoin.
The bad part is - since it is offline, there is no way to know how much bitcoin is in the cold wallet.