I found the guides to be satisfactory, and the drivers to be wonderful.

Bhutan Festival & Sikkim Tour TID 598 (Mar. 22-Apr. 07, 13)
Ugen, Jambay:It was a pleasure meeting you too. I enjoyed the trip immensely, and would have no hesitation in recommending Wind horse in the future. I found the guides to be satisfactory, and the drivers to be wonderful. My only recommendation for improvement would be to explore alternate hotel options in Gangtok. The hotel there was badly in need of new linens – all bed sheets and towels were terribly stained, giving the impression that the hotel was not clean, even though the room appeared otherwise clean. Also, the hot water was feeble at best, and the staff was very poorly trained.
Otherwise, I have no complaints, and wish you continued success.
Best wishes, Laura