I hate big spiders, can't even look at them (silly I know!), moved to country last April and in the September we got quite a few big 'visitors' which almost caused me a heart attack! Heard about the plug in's which release a high pitched sound that only the spiders can hear and it repels them, so far this year we haven't had any in the house, but of course September is the month when they usually come indoors so time will tell. Having done my research these plug in's come up good in the reveiws so I'm hoping it will work, they are about £30 but worth it if you want to keep them out!