This one was posted today at http://www.yelp.com/biz/dassels-petroleum-hollister:
John F.
San Jose, CA
7/17/2009stay far away from dassel's petroleum
The only time you should even consider using these guys is if they were the last propane supplier on the planet, and even then I'm not so sure.
High priced. Service is practically non-existent, and what service they do provide is spotty.
They're rude to customers, even abusive at times... putting customers off on refills, unwilling to work with customers with financial problems. Refuses to test/repair equipment, etc.
Check out some of the other sites on the internet about them. I'm not the only one.