Hi-we live in Webster, too! I work downtown and DH works by the airport. We go to Casa Dia Montessori in Sunset Hills at Watson and Lindbergh. I LOVE it there. They are absolutely wonderful, and genuinely love DS. I can't say enough good things about them. We are moving soon and I am so sad because I can't imagine finding another place I like as much. The infant room (where DS just moved out of) is amazing-Ms. Nina and Ms. Mary are wonderful.
We also looked at WG Child Care and liked it, but not as much as this place. It's a bit out of the way for us but totally worth it. If you have questions about it, let me know!