They are quiet, they do the work and there is no issue with them.
I never had a problem with Manual Transmission. I've been using them probably for 10 years and I never had any problems with them.
Their customer service is good and their prices are pretty fair. The real thing is that they work, they are quiet and there is no issue with them. I don't know if they are the cheapest around, but you get what you pay for to a point. You don't need someone that cuts corners, specially with a stick shift because if you mix match the gears you end up with noises and issues.