MNP starting atlast!

Atlast MNP (Mobile Number Portability) starting today (25th November) Sigh!
I was waiting for this moment since 1st April, 2007 (It is the date when TRAI had first time said that they would be launching MNP on that date) i.e. when i entered my first year of engineering and now i am in last year; it really took a very long time for TRAI to begin with MNP. Because of that old date, i didn't changed my number for a long time, but later i came to know that TRAI's not gonna do it soon and then i changed my number, as usual ;-)
Starting with Haryana today, MNP will start in Maharashtra from New Year's Eve!
Hoping for the best in interest of subscribers :-)
But there are some pros and cons about the same.
PROS:
We'll get a variety of options to select from a wide number of operators as per our needs and priorities.
CONS:
Once we've changed the operator, then we can't switch to other operator till 90 days are completed, which is really very sad :-(