I was using a hand pump and I'm so happy I have bought this one. The build quality is very good. The gauge is very handy. I have 34mm wide 700c tyres and I noticed that 4 bars pressure works pretty good with them. So I can set it to exactly the same level every time I inflate my tyres.
Comparing to a hand pump, you spend much less energy, much less time and you can have much higher pressure very easiliy, plus your hands don't get dirty. Just check your tyres to make sure you are within limits. Thinner tyres, for instance the ones in road race bikes, can handle more air pressure.