Oh boy...I have some comments! As some of you know, we finished a pretty major remodel of our kitchen (really the whole first floor) late last year. Our GC is great. I've known him for quite a while now and he communicates well, is up front about anything and everything, including his mark-up and he and I can have conversations about where to split work, if my wife or I want to do something ourselves. I'd consider him a friend.
We have had a couple conversations about his office manager/partner and his subs (especially his electricians). The OM is VERY slow to respond to emails/texts (forget a phone call). Kinda like
@freedom_in_4low mentioned about his GC...about 75% of the information gets through the first time. Thankfully, it usually only took one reminder to get the rest. His electricians though...I would NEVER use them again. All of my switches sit crooked in their boxes. We had to call them out specifically to finish a couple of things that they "forgot." The worst was they left for the day after cutting holes for can lighting in the ceiling. I have cellulose insulation...and they didn't plug any of the holes. So, for a whole weekend, I had that shit raining down on me every time the front door got opened and shut. They also left a switch completely out, and a BARE HOT WIRE sticking out of the wall. I called the GC immediately that afternoon...well...I fixed it first, then called. I couldn't believe that. Talk about dangerous.
We had issue with our counter install too...They first tried to install the wrong sink...and they cut the counter incorrectly. Incidentally, the counter that was cut incorrectly was a full slab of quartz...that was out of production and we bought the leftover. My wife about had a coronary on that one...her whole color pallet was based on the countertop she picked out. Thankfully, they were able to get another slab (at their cost) and get it corrected.
Through all these issue though, the GC was there for us. He made us feel like we were still in control, he was going to take care of it. His guys were great too...so good that they got Christmas presents from us. Like
@AndyG said, they spent the last half hour of their day cleaning up after them selves. Even throughout the day, they kept their tools picked up, and not scattered all around. They even vac'ed the garage, every day, that we let them set up in so they didn't have to work outside in the snow (or run the saws inside). That really impressed me.