Here is a review left by a customer on a product. Would you say he was satisfied or dissatisfied?
Title: Non-spring loaded connection
Review: I don't know what the OEM version looks like, but by looking at the charger I assume that any kind of connection should be spring loaded. Take a look at your charger, when you press it in, the pins move back while maintaining the contact. With this device, when you push it in, the pins push hard at the contact plates. After a few days of use, these pins bend/break/corrode/... so the contact is not there anymore. If I press it to the phone, it would work but I decided to write it off. I am glad that it did not damage the contact on my phone.
