I've noticed that there are quite a few third party DNS services that you can use instead of the default servers assigned by your ISP.
Some examples are Google DNS, Open DNS or Comodo Secure DNS. A few others mentioned here.
Some of the claims include:
Better security (some claim to filter malicious domains that host malware)
I've tried Comodo DNS which I configured my modem router to use, but I've reverted back as oddly, it broke some of my local network features (network service discovery). Apart from that, the only other difference I noticed was that dead links for domains that no longer exist went to a Comodo page. I can't say I noticed it being either any faster or slower than the one provided by my ISP. Blocking of malicious domains would be a nice feature though (if it works as intended).
What I'm asking then is what is the experts view on using services like this? Do they offer advantages for most people or are you better off sticking with the default ISP provided DNS.