Pros
Mission Minded has a clear market niche and a vibrant team culture. They have a well-established model of incorporating contract strategists into their team and making you feel welcomed and valued. A very sincere, kind, talented, and fun group to work with. Their 20 year track record reflects the good work they do for nonprofits and schools. I would (and do) recommend Mission Minded to anyone who will listen.
Cons
Since I already had an established consulting practice, I had to learn additional and sometimes redundant systems as I onboarded with Mission Minded (eg. additional G Suite accounts, Slack, project management). But the learning curve flattened out by my second engagement with them. Absolutely no regrets!