I highly recommend Manny Timor Tours. They were very professional, friendly, well organised and reliable. We were a family group of ten (four adults, four kids, two older adults), and they were flexible with our needs (we had a full day tour of Dili and another day up to Maubisse and Aileu). They accomodated extra stops we asked to make, and when we needed transport into the evening in Dili, they arranged for the driver to stay on for a small fee.
Lito (aka Manny), Carmen, Alex and Joko were all a pleasure to interact with. And Erni looks after bookings. Can’t say enough good things about them.