I posted my first burn results last weekend - should be able to search for 812S and my post will show up.
Used TDK +R 4x media (CMC Mag) so far, results are ok - plays fine on my older Sharp standalone dvd. Just ordered some TY +R 4X media since the CMC looked like it had some variability in the Kprobe results from disk to disk. Hoping that spending a little more on better media will improve things a bit.
First experience with a dvd burner, works really well - no hiccups so far. Using Nero 6 Ultra to burn.