>> O2 DNS servers,is it something of a big problem
On occasions webpages etc will fail to load.
>> should it put me off signing up to O2?
I knew about the problem before signing up - it didnt put me off. (Same as many many more did).
>> Is it easy to set up Open DNS
Very easy takes about 1 or 2 minutes. Aside from Be/o2 customers quite a lot of users from other ISPs use open dns too.
iirc floydy uses opendns after he started having dns problems with his isp.
Theres full instructions for the different operating systems from here
https://www.opendns.com/startOr
If you manually configure your DNS when setting up your new isp details after migration, it takes about 10 seconds to add in the open dns server after adding your ISP ones.
The nos are 208.67.222.222 and 208.67.220.220
I have Be's set first, and if they do go flakey, then it automatically switches over to openDNS.
Therefore Ive never ever noticed a problem.