PROS:

• Easy setup
  It's literally a matter of minutes to get a Python-backed website up and running.

• Free option
  You can run a website at USERNAME.pythonanywhere.com for free, and it's good enough for a light-traffic website -- it runs 24/7. You get a free MySQL or SQLite database too.

• Excellent customer service
  Really fast turnaround, friendly.

• Easy scaling
  You pay for a number of "Workers" for your web app (to handle requests), or CPU seconds for code that you run outside a web app, and you can get more workers or CPU seconds by upgrading your plan any time.

• Not too expensive
  A basic site with no custom domain is free. $5 a month will afford the user enough power for a typical 100,000 hit a day website.

• Flexible payments
  You can pay monthly and cancel any time, or pay for a year up front to get a discount.

CONS

• No WebSocket support
  lampington
• Python-only on the server side
  Obviously you can put JavaScript in your web pages and so on, but you can't use Rails or Node.