Was a happy Nildram customer until it was announced Talk Talk had taken over Tiscali. A couple of weeks ago the full switch from Nildram to Opal happened. Since then I've had nothing but problems. Slow connections, poor web connection to certain sites including the Opal Webmail site.
It took 2 45 minute (40 mins each on hold) phone calls for Opal to provide me with a migration code so I could get out of dodge.
Anyone looking for a reliable, high quality ISP would do themselves a big favour by looking elsewhere. Those that are tied in to old contracts have my pity although if you're not getting the service you used to there may be a way to raise a case against staying in your current contract.