The most common criticism of the AOTC:ICS is the enormity of the figures, which at a glance seem to vastly exceed observations on screen. Supporters of the book have tried to show that the two can be reconciled, and argue that the existing evidence (e.g. the energy required to vaporize asteroids in The Empire Strikes Back) actually requires such high power levels to be available for Star Wars vessels, though some critics claim that the asteroids in the movie were not actually vaporized. Critics likewise have attempted to support their views. For instance, according to the ICS book (on page 12) a blaster cannon on Jango Fett?s Slave I is supposed to have a firepower equivalent to 600 gigajoules, or about 143 tons of TNT. In the actual movie, the same weapon is fired at Obi-Wan Kenobi but seems much less powerful (i.e. closer to a dozen modern hand grenades), even though the novel canonization says that the shot temporarily drained the weapon's energy pack.
The second most common criticism is its proposed mechanism for turbolasers, most of all the statement that the damaging portion of the beam moves at lightspeed and is invisible, with the visible bolt being a glowing pulse traveling along the beam at sublight speed. Supporters argue that sublight theories of turbolasers (like plasma) have their own problems, though the sublight turbolaser adherents attempt to rationalize any apparent inconsistencies.
Aber wahr sind auch die Filme nicht 
