Weather they work or not, I view them as being over rated, over priced and if yu can wait a year or two probably get em for $29.99 at Wal Mart. Its all a marketing ploy for foks with alergies etc....just like years ago with the rainbow vac cleaners.
Figure out just how much they are really worth. Buy one at X price and recieve another free for no charge just pay ungodly S & H charges, and if yu act within the next 10 minutes they include a small bathroom version worth $60 for free just pay yet again extreme S&H charges....no one gives away anything for nothing, so I figure if it costs $24 S&H but actually it could be shipped for $12.00 then the darn thing is really only worth $12.00 Figure in the opcst of actual shipping, and the am9unt left over is what the junk is worth...And its super how they use a smalldbaby or an old grey mozzled dog to attract you and make it seem like the dude is so honest and sincere. Ever see thre $19.99 pasta cookers.....that cme with a free smaller cooker . My wife picked up one (made in china) but then again whats not made in china at a store here in town that looks exactly like the ones sold off TV and only paid $5.99. It came with 2 containers for cooking in, and a lifetime warranty as well. Its identical to whats sold on TV for $19.99 plus $9.99 S&H, and oddsa re the TV model is also made n China.