I've had fibre with talk talk now for 3 months, and my patience has finally run out - the HG633 router is giving me nothing but grief, having borrowed a neighbours router and modem to test, my speeds doubled and my connection remained stable. Alas after giving back the testing kit and reinstalling the HG633, my speed is back down to 20mbps (on a really really good day) but averaging <3mbps wired - According to the openreach engineer, the proximity of the exchange means I should be able to receive at least my 40mbps I pay for (the connection to the house being rated at 77mbps according to their stats). Frequent drops in connection result in a frustrating and painful experience. Had I had known this would be the case, I wouldn't have stumped the extra cash for Fibre, as atleast my normal copper connection was stable! The idea behind upgrading to fibre was being able to use more than 1 device at a time, however this seems to choke the router. I have also noted a substantial proportion of erroneous packets on both wireless frequencies and wired.
I've tried a number of the suggestions mentioned on this forum but have had no improvement in overall performance. I am on the verge of going to buy a new router to replace the calamitous HG633, however the significant numbers having issues on these forums, I feel like I would be letting Talk Talk off the hook. I would like to try a HG635 however it would seem that they are unwilling to give these to customers!