The 5 gets jacked up at the 57 and then again at the 60. Once your on the 210 its slow going until atleast sunflower/grand. Depending on where the site is in Azuza you may want to get off at Grand and go up to baseline, or exit arrow highway from the 57.
Its not as bad as driving w/ traffic though. I drive from Rancho Cucamonga to Irvine everyday. That BLOWS!!