Bicycle manufacturers have made many attempts to improve rider comfort over the years. Their solutions have ranged from adding shock absorbing forks, seatposts and frames to advocating the returning to the springy characteristics of steel frames with many variations and combinations in between. However, finding the right mix of shock absorbing qualities without robbing too much rider energy being transmitted to the pedal is difficult. This, combined with rider weight and preference makes this a personal decision to be determined by each individual rider. I use them all and can only say, JUST KEEP RIDING and experiment with various solutions until you find the right one for you.
Ken Whittaker