Congratulations on your purchase. I like the cross very well. I have a few charolais cows in addition to my braunvieh and all crossed with a hereford bull. Had a hereford x char calf born yesterday. The cross here will top the markets at the sale barn. I plan on keeping some of my heifers from the cross. I had planned to use a black angus on the that cross, but some on here have offered good advice towards red bulls.
Others may have had bad experience with char cows, I have not. They are not picky eaters and some will milk well enough to raise good calves. Charolais have made some good strides in the size and milking ability of their females. Their disposition for me, has always been pretty good. Went right up to the new born and checked it out with the mother present. But, if you have a bad one, they can be some of the most rankk.
I'll try to get some pictures this weekend. Best of luck with your heifers.