Has Google App Engine improved?

What are the tradeoffs between using Google App Engine versus using my own servers?

• While creating a new website, and maybe an idea, Google App Engine seem to be a good cloud hosting, do you think the developers should implement the code to work on Google App Engine or it's better to use our own servers ? Updated: The project use real-time updates, wich cost a lot on Google App Engine, but also the project use Google Log-in and it's based on GWT.

• Answer:

  Google Appengine provides scalability, security in short 0 maintainence but trade off being rewrite the code but have to stick with few documented limitation...most of the web apps could by pass those limitations by redesigning your application. Usecase: Our new live cricket service (http://www.cricwaves.com/) is built on google appengine, earlier it used to be LAMP environment...we completely ported to google appengine and seeing the benefits of  it.. 1. At times we get 500 requests/sec, earlier we used to loose users as our servers doesn't scale to burst in traffic...we had to configure new server (which used to take quite some time as we use several 3rd. party packages) 2. We never had hacking problems as code is secured (some of the limitations like mentioned before are infact good for security and scalability) 3. Google provides upto 5 million page views per month free...so usually it covers for small end simple websites...and we pay only for the resources exceeding free quota..No PAAS provider currently provides that...This flexibility is some thing what makes someone to jump and try on it...