I've got a mix of mudguards. The SKS Chromoplastics are good, easy to install, good coverage and largely rattle free. I've also got Bontrager NCS mudguards which are equally good when compared to the SKS ones, fit very easily, are very adjustable and totally rattle free.
However all of them are outclassed by the Kinesis mudguards, Solid aluminium, very stiff as a result of the design, very very nice looking and durable and totally rattle free with much better coverage than the SKS and Bontrager ones by default as a result of the longer mudflaps.