So I sent the link to my friend because I've been unavailable to get over to his place and help him out with setting up his system and wiring it. He called him and had an appointment yesterday for him to come out to his place.
He says the guy came out, wired up his cabinet quickly, made it look very nice, mounted his monitor and setup his machine without any issues and was pretty friendly. My friend has had an issue with a Monitor, and the guy seemed to be very familiar with the model. The guy ended up explaining the issue, and said he would work with him to get it fixed if he wanted for no extra charge if he couldn't get the issue resolved on his own. So that seemed pretty cool.
Now my friend did question him about the 19" monitors and the guy replied that what he posted on craigslist was basically something he copy's and paste or just repost all the time. He did however mention that he has 15-17 19" monitors that just came in over the weekend so anyone asking about it could call him now. I asked my friend if he followed up the question on whether they were LCD or CRT, but he didn't ask.
So while I didn't use him, my friend ended up using him and he felt comfortable with him. Hope that helps.