I use GMS and like it. I know I don't use it to the full extent of its capability, I really just use it to keep track of medication that I have used and for pedigrees. I think the pedigree charts are awesome. Its a pain in the nuts until you get all of the deer pedigree entered, but after you have them in and start adding / breeding new deer its cake!. just a couple clicks ... and BOOM there you have the new linage chart, right down to all the notes you have entered for the different sires / dams.