Think It Over is the best of four winners out of the unraced Personal Service (Zabeel), a Broodmare of the Year in Australia. She is a half-sister to the Group 1 performers Universal Prince (Scenic), who won four Group 1 races including the Gr.1 Australian Derby and the Gr.1 Ranvet Stakes, and Universal Queen (Scenic), winner of the Gr.1 Sangster Stakes. Two more half-sisters became dams of Group winners: Razzia (Scenic) produced Lucy Mae (Stratum), a Group 2 winner, and Soft Landing (Al Maher) is the dam of Krone (Eurozone), winner of the Gr.1 Coolmore Classic. Personal Service died in 2022.

Second dam Biscay Bird (Bluebird) was a winner and is a half-sister to the sire Blevic (Scenic), winner of the Gr.1 Victoria Derby.

Third dam Blooms (Biscay).

Think It Over is line-bred to the mares Special (Forli), Lalun (Djeddah) and Perfume II (Badruddin), and he descends from Marchetta (Marco), the third dam of Perfume II.

Personal Service's final foal is the unraced 4-year-old Normie No Show (Exosphere).