There is no brand that seems to be better than others in general. Less expensive/generic versions are equally good.
However, the Good Belly Brand of probiotics seem to be a good option, this can be found in many grocery stores.
There are studies that are supporting the benefits of each of these recommendations there appear to be no significant problems or risks with them.
I also recommend the probiotic in different doses for all ages. From infancy on (full term babies).