Let's discuss concrete countertops

We'd like to install new countertops in our kitchen. It's an old farmhouse style house and we'd like to find something to fit that style. Something simple. I'm very diy handy and know I could handle concrete countertops. There's a company from PA that sells cast in place forms and other accessories. Looks like it would run about $1,000 for our countertops (about 30sf) in white concrete. My concern is the durability and long term look. I can't find much real world info on concret countertops other than manufacturer info and people that just installed them. I don't see any multiple years later reviews. I guess this is both good and bad because if there are problems, people usually bitch on the Internet.

So, a few questions:

Y'all thoughts in general on concrete countertops.

Anyone have concrete countertops for a while? If so, thoughts, pros, cons? Are they a pain in the arse to keep clean? Do they stain easily? Do they hold up over the years?

Is there another alternative that could give us natural countertops in solid white? If so, typical cost/sf?