Succes with Vivastar unbranded silver 2x ?

Has anyone had success with Vivastar unbranded silver 2x? They are selling in spindles of 100 very cheap in North America.

I need to know if it works well with the XBOX, I am currently using white top 1x Princos (which work ok, sometimes I might have to reburn games if the videos skip and some games only load if I insert the game and then restart the system..anyone else had the same problem?)

Thanks alot!

princo's are rubbish, i have been using some of the vivastar unbranded 1x discs which are fine in xbox but i haven't seen any 2x ones over here yet