Battle Beyond The Stars was one of the better Star Wars clones. The special effects weren't "great" even back in 1980, but they add to the low budget flavor of the movie. You have to remember that this movie had a substantially lower budget for special effects than an "A" picture like Star Wars. Early detailed models by James Cameron (TERMINATOR/TITANIC) are the high point of the special effects. A lot of people got their career start on this film, and Cameron was only one of many.
The script for Battle Beyond The Stars had a lot of things going for it, from the aliens to the quirky characters. I found the race of Nestor to be the most interesting concept of all. Just the thought of a race of beings that can hear/feel/think together as one conscious entity could be a great movie plot in itself.
The excellent casting of actors and actresses was another strong point in Battle Beyond The Stars. John Saxon, George Peppard, and Sybil Danning especially shine through in their acting performances in my opinion.
Battle Beyond The Stars is, quite simply, one of those movies that's so cheesy that's it's something special. It's a fun movie that never takes itself too seriously, and I don't either. I guess that's why I still enjoy it after all of these years.