spin balancing vs bg balancing

I went with the ceramic beads a few weeks ago. Tire guy gave me a choice between balance with weights and balance with ceramic beads. He said the pros of the weights is they are always balanced when you start out, but the con was I would need to come in every 5-10K to have the rebalanced. For the ceramic beads, the con was sometimes when you start out after stopping I may notice a vibration for a few miles while the beads rebalance, but the pro is that he would throw a bag in there, and after that forget about it, no rebalance ever needed. He said both work just as well. I asked about equal, and he said "There is nothing good to say about any powder, it is junk and should never be used in a tire".