Visit on a clear night so you can see planets through the telescopes. Also, plan your journey through the exhibition so that you can make it to all the special shows you’re interested in that start at different times - you won’t want to miss one! I especially enjoyed the Tesla coil show.
If you want to have most of your experience, come early to check out all the stuff on display and be the first in line for a view of the telescope. Once the sun starts to set the place is getting crowded!
Location is really close to attractions like Griffith Observatory, Hollywood sign, Hollywood walk of fame and two film studios. Room was spacious and clean and they have free parking.