I really enjoy Masterbrain and after taking it for 2 weeks these are the results I felt from the product:

Works well. Looks good. Charges relatively fast (though nowhere nearly as fast as directly plugging into the phone). A fraction of the cost of the Samsung wireless chargers.

Had great price and great reviews so I choose it over other brand around the same price. I love this bike!

For a book on accounting, this doesn't totally suck. His examples are entertaining and helpful. NOT ideal to read on a smartphone, though, because the tables wrap oddly.

I was having great results with noticeable thickening of my hair after only 1 month. However, after starting on my second bottle, my chest and neck started itching. The Formula had changed with Biotin increasing by 300%. After some research I found that high levels of Biotin cause an allergic reaction in many people. After stopping the supplement, my itching has cleared up. I am now in search of a different product for Hair Growth w/ a lower amount of Biotin.