Bob is an IT professional and wants a good Windows based tablet. Leo says that the Microsoft Surface tablets are excellent. Lenovo makes a good one, as does Asus and Acer. The Surface is premium priced. Lenovo's Yoga is excellent.
Leo suggests that Bob consider the Lenovo Ideapad Miix 300, which looks to be a great option at just $249. What about the Winbook? At $60, you get what you pay for.