Now a reasonable look at the Slayers series.

It's not immediately clear which order this is meant to go in as most of the episodes take place before the events of the main series apart from Slayers Premium which takes place after Slayers Try.
The episodes frequently feature Lina Inverse travelling with a busty sorceress named Naga the Serpent who is just as capable but extremely full of herself and will laugh alot.
A typical plot often involves coming across a minor to mid level evil that needs vanquishing and Lina and Naga often doing more harm than good to resolve it, it keeps to formula extremely well despite the lack of characters for Lina to play off on and the quality can be some what mixed, the Slayers TV series is also guilty of the same problems but are usually surrounded by better episodes while the OVAs and films only have one shot per attempt with mixed results. Even the longest movie, Motion Picture can spend half it's run time dealing with filler villains before the main one shows up. My only other issue stems mostly from Premium but some of the others have it as well, the comedy is cringy.
I will give the dub props as the voices for Lina and Naga actually suit them better than their voices in the TV series especially Lina who sounds more spunky than her Amy Rose voice.
Final Verdict: The OVAs and films keep a solid formula and is well backed up with a decent dub, it's humour can be cringy but each episode and movie is at least fun.