I use only GPS Results becouse it is easy to use, have option for averaging two gt31 at same time, it is quick for view, edit, import google into it, so that is my opinion
GPSR have them all, quick and easy and cost is only 20€ for lifetime key for all new versions and updates
Don't like Action Reply becouse they works in java, so you need java runtime to start, graphics is very poor and options are more than complicated
so much from me