Can you please share with me your personal stories with switching preschools/centers?? The good, bad, ugly!

We really like our current center but we are seriously considering another preschool for our eldest for various reasons (mostly to do with later Kindergarten placement and the loss of a super great Pre-K teacher at her current school). Our younger two kids would stay. LO has been at our current place since the infant class so we are all pretty attached.

I know it'll take some time for LO and our fam to acclimate to the possible new school so just wondering what that has been like for some of you. Please share!