We just published a pretty comprehensive scoping guide, including advice on which ones to buy and actual scoping technique. It's talking about mites only for the moment, but we're working up the mold and mildew installment. Here's the link: KindReviews.com Spider Mite Guide Part 2: Scoping Your Meds

I haven't actually used Dino-Lite scopes, but I took a quick look and it seems that they're heinously expensive for the resolution and scoping specs from what I can tell... the Veho 200x is only $60 and does everything we possibly need to scope all the samples that come into KindReviews. Dino-Lite has a model selling for $129 that's only a 0.3 MP camera (didn't even know that existed)... the one I found that has similar specs to the Veho 200X is a fairly insane $399.