was watching a video on them earlier, they are gps guided rockets with a 5m radius of error from 50 miles. While its not a large number, they can do a lot of damage assuming accurate targeting can be done via drones etc. As long as they can be kept safe and fed with rockets they could do a lot of damage to Russian artillery positions. even better if they can take out the thermobaric launchers.
I also get a feeling this will increase over time. once its proven Russia wont do anything after they are there, increase the numbers and the quality of the ammo. there are some that can hit with 5m radius of error from 500km.