I havent had any particular issues with the mechanical part of the keyboard. Whats better the firefly or the goliathus? Well I bought both. For this price the sound quality is really aweful. I liken it to driving a dragster in the city. Love it except for the black straps. The packaging was offical so the headphones must be too. Well, flip flops do not last forever and it finally broke. There was no chance anything was falling out or moving in transit. They?re practical, look stylish with different stuff, and overall, a really good shoe. I happened to order a medium as well because the Large was just too long and a bit too bulky looking in the waist.