spin balancing vs bg balancing

I had beads installed on my 6 new GY tires in april of this year. The beads come with a new valve core. It drove a little funny for the first few miles,but the road was rough, so I don't know if the bags had not broke or was it the road.
The ride smoothed out after a few miles. I now have about 11k miles and the ride is very good. Buy the way they changed all the tires by hand and it was quicker then a tire machine good do it. I would have beads installed again.