I have a C4 as a musky reel and absolutely love it. I also have a D5 which is on my 6'6" med baitcasting rod, this gets used for casting and trolling for bass and walleye. One thing I noticed about the D5 is that you get any amount of water in it and it'll get sticky to retrieve. I've stripped this reel apart and regreased it and still can't figure out the problem. As for the C4, you can do just about anything to this reel and it won't stop. I also have a C3 which has had the living snot beat out of it and just won't quit!