When starting the pull many lifters that use the frog leg style will drop their hips initially and will start their pull while rebounding from the initial hip drop. The weight should be mainly felt in the middle of the foot. It is suggested that the back angle should remain the same throughout the pull and the hips will travel upward. When the bar is past the knees the hips are thrust forward. Proponents of this style suggest the final explosion phase should be initiated at or above the middle of the thighs. Since the hips move more in an upward path, this style will end with a straighter pull. There is also a less chance of the bar swinging (horizontal and vertical movement) with this style of pull.
Is the Frog Leg style right for you? No one can decide this for you; however I would suggest first learning the traditional pull style. If you have been using the traditional pull for roughly 6 months to a year and feel it is not the best pulling style for you, then you can look into the Frog Leg Style.