First, there is nothing wrong with a Harris for run and gun. As far as I can tell, that is what it was designed for - fast deploy, and better than shooting off a ruck or a rock. The design does have problems when you are doing precision shooting. First and foremost is the canting. The factory locking mech does not hold which is why podlocks are on so many Harris'. Next in line I would say is the spring in the lower leg. It takes a consistent load on the pod (between human and rifle) to get both springs down equally, and it is darn near impossible to keep them compressed during recoil. Third is the leg material - it is not the highest quality so the flex is unpredictable. Next is the mounting. The mech to mount to the swivel can be turned with pliers to get it tight, but the number of parts used in that process to get 2 pins into a swivel is a failure point. Even if you drop the money on a QD conversion adapter, the weld/material at the top is a failure point. Lastly is they are off-center.
For all of that, I own 2 Harris'. One has an ADM QD adapter and a podlock, and gets used throughout the year. The other stays in the truck for when the main one fails. The bipods that I use the most are Atlas BT and Accu-Tac FCG2. They have their pros and cons, but always get used unless the quick deploy is a must for the day.