Reading Double Layer with 520

I hope to be helped even if I have more than one question. I tried for the first time to burn a DL DVD+R (Verbatim 2.4) with LG GSA 4120B. It took abt 40 min with Nero and was successfully,but unfortunately I could read it only with LG unit and seems not OK in the final with freezing images.
I hoped that it would be possible to read it with my Pioneer 520 DVD recorder but the disk isn’t recognized. Now my question to the experts in DL burning and reading is:what is the best way at the present to PC burn-DVD player read a DL? I think Verbatim media is OK, but may be there is something better.
Thanks to all.