This is just my 2 cents on the subject
In order to make a PC grow worth it you must have the following-
-24"+ pc tower
-Lowryder strain or use low stress training LST techniques
-Adjustable Mesh shelf to lower and raise plants close to the light
-at least 4 26w+ CFL both 6400k and 2400k for veg and flower
-STEALTH!!! It better be stealthy or why in the fuck else would you be growing in a pc case!!
So yes it does work if done correctly.
I personally made my own but PLEASE do not get jipped by people selling these for $400+. If you are going to buy one check out ebay (if you already havent) or
Stealth PC Grow Case.
laters