For the most part i didn't have issues with the ceton, however, I believe at some point, updating firmware/drivers i started to get the single line of pixelation issue on my copy once channels (e.g. HBO). Otherwise the ceton was generally solid.
I switched to the HDHRP and do not have the pixelation issue, additionally channel changing is faster with the HDHRP. Stability has also been good.
If the pixelation issue had not occurred i would have stuck with the Ceton.