I've been using two ESP-201's without problems, so it couldn't be a generic problem.
Often people forget to pull GPIO-15 down because it's not necessary on other boards but I couldn't imagine you forgetting that.
When I've received it, I had to reverse the 4 pins header for serial.
At this first day, I've already seen bad quality of the board, the solder pad were easily ripped off, but I've got the serial pins soldered again. But after usage, it didn't last, yesterday, seeing bad serial connections, I figure out that the soldering broken again, pad lifted on the other side. I've tried to fix it, although the serial lines seems to be Ok, the module is in kind of weird state, even previous uploaded sketch doesn't not run. I will try to figure out, but I'm thinking to throw it in the bin.