If this is the same tube as Sony's g400 you could be in for some frustration. On my g400, the default settings(geometry) were all wrong, took several days adjusting, playing with it to cure the image [ed: too tired to return it] though now it actually quite perfect, LCD-like quality. Sony must not QC their sets.
Want to add, I read so many complaints on the net about the g400 but I personally think these are not a problem of the Sony tube itself(which is lcd quality), BUT that its been VERY slopily calibrated at the factory. The geometry and browning/blue spots of these monitors, which I BOTH had, are correctable but they will require a cruel patiences on the part of the consumer.