Always hated him every time we played them (a compliment to him). Surprisingly press resistant, annoying defensive presence for opponents, great at winning the ball back, PL proven - and sometimes scores too, think he is a smart signing for cover. Provides a lot of tactical flexibility to United.
To everyone saying "Oh well if he's so good why does Spurs want rid of him?" it's because he expressed that he wanted to leave this summer and has been trying to secure a transfer to Atletico for months. Obviously when a key player expresses to a new manager that they want to leave, it's not a great idea to make him a part of your long term planning.
Good player, PL experience, good age, position of need, workhorse, loved by his former managers, been a leader in the dressing room at two consecutive clubs now.