S.
My daughter goes to Primrose in Highland Village 3 days/week...and she loves it! We started her there at about the same age as your daughter...23 months. And, her language and social skills have really developed well since then. And, I've been really happy with the curriculum they use there. The only negative has been the turnover of the teachers in her class. I think there are two Primrose Schools in Flower Mound...you might look into those as well.
Good luck! I know what a tough decision it can be.