It's been pretty good so far this season but it barfed all over itself on the 12/18 event inside of 72 hours.
Plus, back in the day the GFS was so bad with coastals, you could almost ignore it (even nowadays on legit KU-Esque coastals it still has problems imho...though we haven't gotten to test the new core yet...we haven't had a true legit one since March 2018).
But GFS was pretty good with SWFE so when you had Euro/GFS agreement at 84-96h I remember you could lock it in...ala 12/13/07 I recall.