Depending on where she is at I've got 2 suggestions near downtown. If you want to go the dealer route, Land Rover Houston Central has great service guys, but they are pricey. A better option just west of the Galleria on Westheimer is S & S Auto Services, 2611 Briarhurst Drive Houston, TX 77057 (713) 782-5920
The do lots of work on off warranty Land Rovers and are straight shooters. I hope that helps.