Coming to Arusha from Nairobi

Hi all
I am moving to Arusha with son 4yrs and hubby in two months time.
Currently in Karen Nairobi so I know how east africa works generally.
My question is, how will I find arusha compared to Nairobi, cost of living, things to do, expat places to hang out etc?
How is the security there generally and at the schools compared to nbo?
Is kisongo a good place to live? Any good schools to recommend? Good pubs bars and restaurants? Things to do with kids? Other expat groups?
Please do share!!!!
Thanks!!!

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