I've been running Superstar components on my bikes for the last couple of years and they've always performed faultlessly - from simple items like brake pads, through to handlebars, rotors, grips and custom wheelbuilds.
Everything has been bang on - and I'm no lightweight XC gaylord - I race Enduro at international level (EWS and SuperEnduro) as well as domestically. Never had a single problem and will continue to use Superstar parts for many years to come.
I use Superstar for my Mountain Bike consumables and bling and can't fault them.
For brake pads, for example, they source pads from major manufacturers and sell them for around half price of the major brands (i.e. the people whose name is on your brakes). My bike stops. End of.
I've also had lockon grips with fancy colours and they look ace. My son's bike is getting bling stem and quick release collars to make it look suitable for a teen about town - all at brilliant costs, delivered quickly.