There is plenty of signage directing you to the Jelly Belly factory and plenty of parking in the lots, which is always a plus. The tours run every 15 minutes, but there was a huge line when I went on the weekend. It was worth the wait, though, because the inside of the lobby, which is between the cafe and the gift shop, is filled with so much eye candy (ooh, pun!). There are no photos allowed on the actual tour of the factory, but it was all so cool looking! There are several stops where we watched videos and narration of the candy making, and at the end, we each got a free small bag of jelly beans!
As you walk out, employees show you pics that they take of you prior to the tour that you can purchase, but if you're not interested, I would suggest quickly bypassing it to be among the first at the sample bar where you can try as many different kinds of candies as you want.
The gift shop is pretty amazing with every kind of candy Jelly Belly produces or is affiliated with. As others have mentioned, you can also buy "belly flops" in the factory store, which are the "defective" Jelly Bellys sold at a discount. Their apparel section and other random gifts are diverse too. I totally had a good time!