i prefer SoilBlocker like Barry above. i called Mike @ HardBall (nice fella) and ordered a couple containers of unscented and 2 of lemon scented....he has a nice variety of fragrances available which is different than other protectors.
other than the fragrances, i prefer S.B. because it comes in containers that fit right into my MultiSprayer! i gotta tell ya, that makes it easy! and then when i empty them, i'll remove the sticker and use it for other cleaning solutions.