Well from this Southern LAkehurst, NJ Boy (lol) I think a quality stainless excluder might make a fine Barbeque Grill - if it meets the FDA approval. But I have two, mint scondition and gladly would have given Bigrog one if I thought it were worth it's weight in Genuine Imatation Plastic.
But they are not, and except in some very rare cases, such as multi-hive stacking, multi-queened hives, etc., they are useless. But if you are just using one to keep a queen in her place, all you really ever do is keep your workers from getting any work done.
BTW, thanks for the kind words about the forum and it's helpfulness. I agree, you can find bigger forum out there, but you will not find a more helpful and friendly bunch on the net concerning general beekeeping issues than here! Other places tell you go go search their engines, or that they've answered that before and ain't gonna do it again - ugh. If people wanted THOSE kind of answers they'd do generic searches themselves and not be put through group humiliation tactics that some of these forums seem to get OFF on.
Last comment about such things. I take little to no credit about this forum or its membership. These fine people found it and made it the success it is, I did nothing but give them a little space to share their thoughts and ideas - they all did the rest. So if you decide to become a member here, you are joining a great group of dedicated people who appriciate answers and offer help to anyone who stops by - to some folks, that is a burden, but to the people in this forum, it's as natural as breathing!