Just get lots of quotes before you decide to use them.
I had them give me a quote, and ended up finding another experienced operation that was less than half of what Lyons quoted me for my foam roof. I've been very happy with the job.
I just didn't get a good feeling with the salesman they sent out coming out and closing the deal with all the games. I'd rather deal with someone that actually does the trade and not a guy that just wants to get a commission.