Mono (Maxima) on my spin setups. Not perfect, but the best I have found overall. Braid is fantastic for bobber fishing, but it absolutely sucks for just about anything else, IMO. Because it's so limp, when you get slack in braid, it gets tangled around itself, around reels, and around guides, none of which are good. Mono does tend to get twisted badly when fishing spinners without good swivels, and when that happens, it's at least as crappy as braid and maybe worse, but it's a lot easier to untangle mono than braid. Mileage will vary!