Have you ever used a personal trainer?

[SuperChief]

Long story short, my wife and I are both starting a new journey w/ fitness and food. We're seeing a dietician soon to get some help with the food part, but we've also been considering getting a personal trainer (either one for both of us or separate - either option is on the table).

Does anyone here have experience with one? What are some good questions to ask to make sure I get the "right" one? Any tips to set us up for success in this process?