Fortis and Glycine service recomendations

I have a Glycine and a couple Fortis watches that require service and repair. All are 24hr watches with base ETA cal. 2893-2 movements. There are only a couple authorized services centers in the US with parts accounts. I've heard of things not going so well at some of them. I was hoping to hear of some good experiences, if any of you have them. I'd also take other recommendations if you have them.