I have a Sony S5000ES and I have a BD-RE 50GB and it worked just fine.
I bought a blu-ray that was region locked when I thought it was region free....so I made a back-up copy (just for myself) with the region coding removed. It was a dual-layer Blu-ray so I had to use a 50GB to make it work.
So in fact this performed two tests...the LG blu-ray writer worked with this disc, and my standalone Sony blu-ray player worked with this disc.
Note: TDK branded.