If you are riding to Panshet from the south side, I strongly recommend that you do not follow the directions that Google Maps gives you. Google Maps will take you all the way up to Pune and then send you back because its a faster route. If you do that you will miss an amazing stretch of winding road overlooking a beautiful valley.
Directions: Take a left on NH 4 at a village called Nasrapur and then ride to a village called Velhe. This road is also quite scenic winding through fields. Just before you reach Velhe you will find a road going right climbing up a hill. You will climb for a while, crest the hill and then eventually descend into some amazing natural beauty.