how many months old do u start to let ur lo use walker?

I let my LO sit in in without the wheels at 4 Mths to enjoy the activities that come with it. At 6 months old when he is tall enough and can stand,I put the wheels and let him use. But he only used like at most 5 min a day. He is 8 Mths old now and is cruising on his own. For me I feel that the traditional walker is safer than a push walker as a push walker is more accident prone. Can easily fall backwards n hit the head ... A traditional walker can give the caretaker some time off for a toilet break etc yet keeping the baby safe from falling . I grew up in a walker too and I believe that if there isn't excessive use, there is no problem. N to let the babies "wander" around the house without any walker may not be a good option unless u want to put playmat in the whole house ..