Slayers Premium is a huge step back in quality from Slayers and Slayers Next, I'm obviously glad it's no longer than 32 minutes, but it was 32 minutes that were quite painful. First, let me say that I watch Slayers in english dub (yes, yes, I know, heretic.) It's one of the few series I prefer the dub over sub. And Slayers Premium changed the voice actors... It's dreadful, the Lina in Prenium sucks, it doesn't fit the character at all and even then most of the cast seem to be acting out of character for no apparent reason. The art is also stepped down, aswell as the music. The story is uninspired and dull and, like I said, thank god it's only 1 episode; because I would have dropped a season that starts like that.

So yeah, overall Slayers Premium is simply a bad OVA, but that happens all the time in anime doesn't it. It is not necessary to watch it to understand the rest of the series, skipping it would be recommended, unless you have time to kill. It also doesn't bring any relevant backstory or anything like that, so it's really just a basket of stale bread in between the main dishes.