I like how small the product is and how it “clips” onto a phone: It uses a magnet. Provided that’s not going to wipe my phone’s data (on no!), I love the implementation because it’s quick and easy. Take a peek the product demo and its usage on a Galaxy S 4.
I don’t see pricing for the Galaxy S 4 version of this but the model for the iPhone 5 and iPhone 5s has an MSRP of $15.00 according to Amazon, which currently sells it for $10.58. That’s a small price to pay to see tiny objects up close and take clear images of them with a handset.