I am a vegetarian and for me options in Hyderabad and espicially Banjara Hills are pretty limited. Most restaurant serve non vegetarian food and I prefer not to eat at a restaurant that serves non veg food.
Bikanervala is like a blessing in disguise for me. They serve pure vegetarian dishes and they have ample variety to choose from as well. The restaurant is very funky and well maintained. It is ideal for a special occasion.
The have plenty of options since they serve Indian, Chinese and Continental dishes. They serve some exotic dishes like Nellore Dosas, South Indian Platter, Crispy Shanghai Vegetables, Chinese Combo, Hyderabadi Chaap etc.
Bikanervala is quite reasonable and serves some delicious food.