My relative's daughter completed her SSC from CBSE board and has taken science for 11th and 12th. For coaching, they had two options: Allen or Bakliwal. After taking quite a few session with both the institutions, they went with Bakliwal.
Bakliwal has been good so far. They teach thoroughly, so you need to be mentally prepared to absorb the load that one might face. Do note though, that they institutes have tie up with certain schools in Pune, so in terms of managing between school and coaching studies, it becomes easier. Most of the times, you might not need to attend the school classes.