I have a set. Very capable for the size. The only "problem" with it is that Bosch introduces very few new tools. If all you really need is a drill/driver and an impact driver, it's really fine. Much better than an 18/20V on top of a tall ladder.
If you're looking for a 12V system with all the possible tools, Milwaukee is the only option. (There I said it.)
I came into it sideways. I picked up a Bosch 12V multi-tool at a yard sale for dirt cheap, dead battery and no charger all for $8. I took a risk and bought the drill driver/impact/2-battery set for $90 on sale, figuring I could return it, but both the dead battery and the multi-tool were good. Since then I've added the magnet LED light, which is super useful. I picked it up on closeout so no sure that exact model is still available, or the store was just dropping carrying it.
Since Craftsman moved in, now the Bosch 12V display at Lowe's is about 1 cubic foot.