Its quite well known that the 360 break a lot. I've had a PS2 since launch and its still working to this day.
However out of all my friends who own 360s we have all had to get our 360s sent in for repair.
As far as I recall with the height of sending in of broken consoles to the German repair center (where mine was sent) they were taking in something like 1000 consoles a day.
If you purchased a console near launch you are pretty much guaranteed that it will break (its just a matter of time). With the newer models they have changed parts to reduce fan noise and also reduce the factor which caused the most red lights of death.
However out of all my friends who own 360s we have all had to get our 360s sent in for repair.
As far as I recall with the height of sending in of broken consoles to the German repair center (where mine was sent) they were taking in something like 1000 consoles a day.
If you purchased a console near launch you are pretty much guaranteed that it will break (its just a matter of time). With the newer models they have changed parts to reduce fan noise and also reduce the factor which caused the most red lights of death.