My second store is a vanilla OC store version 1.4.+, and I was able to install it and get it running in about 1 hour. That store can be seen here: http://www.glolar.com/store.
I took some advice from this OpenCart site and went with Arvixe for my web-hosting company, and I think that had a lot to do with my ease of installation. I told them up front that I was installing OpenCart, and they made sure everything was set up correctly on the PHP side of things, so I had no problems.
Don't know if everyone would consider these two as examples of "GOOD" stores, but I think they turned out pretty good

Your mileage may vary!