I have used low fees without many problems, sometimes to my surprise the transaction gets confirmed within a short period, some others I've had to wait days for them to confirm. On a couple of occasions after waiting forever, the tx were discarded by the network and the bitcoin returned to my wallet.
If you're lucky maybe you'll get a quick transaction and confirmation with a low fee. But if you really want to get a quick transaction. You can use the recommendation fee. Usually a blockchain user will understand this