I purchased the Queen Excluder for EasyCheck Mite Wash and was excited to try it. Well, I can honestly say I'm not impressed with the first use. True, it is very easy to scoop up the bees for the sample without worrying about your Queen. It took way too long for the bees to work their way through the excluder into the Dawn/water wash. I had 4 hives to sample and gave up after 1 hive. Sorry guys. BTW, I LOVE Lorob Bees! I own the electric version of the OA Vaporizer, and the great customer service Rob and Lori have given me so far!!!