It's certainly something I'm thinking about - keen to get feedback from someone who's actually used one before I part with my £90 though! The problem I face is mainly at speedway - you have roughly two - three seconds as the riders come round the bend in front of you in which to nail your shots. Once the light falls, it reduces your possibilities rather if thanks to the flash not firing you effectively only get ONE shot at it rather than the more usual burst of three!