As far as I know with cherry shrimp, they breed a lot! So expect babies!
They need water quality to be the best, as I believe they are pretty sensitive
I considered shrimp for a while, but decided to stick with snails in the end! So I don't know a massive amount about them.
If you pop down to PFK though they have a shrimp section; (Link is not visible to guests. Please register to view.
So they will possibly be more able to help with advice as I don't know if anyone else here has shrimp?