There is no problem with having to measure the pressure using the detachable gauge. If you leave the gauge attached and connect the hose (which screws onto the valve instead of those stupid clamps), you can see the pressure of your tyres by pressing the button on the guage. If you need to pump the tyre up, hit the "on" switch. If the tyre is over-inflated (quite common when having new tyres fitted), press the release valve (a great feature) to bring the pressure down.
The quietest and most robust pump I've used. It's easy to pack away too!