The problem is: it's very easy to press a button, but it's much more difficult to know the background behind the calibration process. I have been calibrating projectors and TVs for many years, but also today I learn new things about calibration.
And as already said: it depends on your device which should be calibrated. Sometimes you need special knowledge to calibrate it, sometimes it's very easy.
Source: Samsung UBD-K8500 (UHD), Panasonic BDT-110 (BD), Toshiba HD-XE1 (HD-DVD), Vantage VT-1S (SAT), Kathrein UFS-924 (SAT)
Calibration: LightSpace CMS, SpaceMan, SpaceMatch, CalMAN 5 Prof., Chroma Pure, Lumagen Radiance Pro 4446, Chroma 5, SpectraCal C6, EODIS3, i1 pro 2, Klein K10-A
Target: JVC-X7000 (Beamer), Panasonic TX-P65VTW60 (Plasma TV)
Sound: Yamaha RX-V2067 (AVR), Teufel Theater LT 3 (Speaker)