I have a 4" male right now. Had a female for him but she unfortunately got rip to shreds by a Synspilum. They are very cool. Far better than convicts as they are more owner responsive. Though Don't keep with similar sized fish as I have had bad experiences with it. They are bullies and have lots of attitude at least IME. I love my little guy.
When they grow big they look OUTSTANDING with tons of shimmering blues and golds.