Wonderwands are happy at 100 Psi upwards, i usually run at 200 - 250 Psi,
They are heavy as they are all stainless steel, and the design of the head increases the weight low down,
Everything is quick release, you can change all 3 jets in under a minute, not that you need to!
It is a quality bit of kit, but as others say it is a Marmite job.
If your technique is right most jobs can be done one handed, you may gain weight and you probably
won't sweat as much either. And if you get a minger or a stubborn patch, whack up the pressure,
you will not do any harm.