I would recommend this museum for parents with very small children, but not as an activity for adults or teenagers. It is mainly used for school groups in the San Jose area, and this is what it should be used for. The part that is accessible to the general public, and not school tours is limited. The walk through of the exhibit took less than one hour, including the time spent at the gift shop.
The coolest thing was the real mummy on exhibit, there was some interesting information, but nothing outstanding.
The museum is open 7 days a week, standard business hours. They also have a planetarium that I was not able to see. There are limited hours for the planetarium, and limited showings. The tickets are free to get in, but it is only while supplies last. So if there is a school tour they reserve the tickets ahead of time and you cant get in. That's what happened to us. If you want to go, I suggest calling ahead of time to try to find when there are the least amount of school tours planned.
The gift shop is small, they have a penny squishing machine which is always fun but there are not a lot of things for sale. There are a lot of Egyptian themed things in the gift shop, but not like little buyable things kids would want (like cups, or toys). There's a lot of grown up things like bookends or clocks.
There is close parking, which is really good. It's just one street away and if you're lucky you can even find closer metered parking. The outside of the museum is very nice. There are a couple of courtyards to have picnics at. The theme of Egypt is continued throughout the grounds. It was not worth the $9 general admission fee to go inside. At a cheaper rate, yes but not at almost ten bucks. To take young kids on a rainy afternoon though, its not bad.