Corsair make very good PSUs...it's fine from a quality view. You may get a PSU which has just as good quality for a little less money if you look around. Seasonic, XFX, Be Quiet!, Silverstone, Enermax...these are all good PSU brands.
Corsair has great PSU's, they are very very good, but as Silvune has said they don't make their own psu's, most are made by Seasonic, CWT but they are well made. Corsairs are great, look around and you will find other great manufactures like Antec, and Seasonic.