My tuppence:
Henry works really well and has very high quality tubes but tends to fall over, jam on walls and trips over it’s own cable or rug edges. It’s great value and cleans well but is not very suited to weaker people or those with wrist/hand injury/weakness/arthritis etc. This will also hold true regarding the cable return – you have to be strong enough to bend over, pinch-grip the knob and rotate the cable winding drum.
The angled plastic end that fits over the metal tube [flexible hose/handle interface] tends to split along the mould line, however this is easily fixed with a wrap of duck tape etc and isn’t a deal-breaker. You could probably get a spare from Numatic for free if you ask them.
Used a couple of Mieles, seem to be very good quality but both have had short cables and little wheels underneath which also will catch on edges/rugs. Much lighter though, and with spring-loaded cable return. Very powerful.
I wouldn’t worry about the power consumption being limited, it’s just to stop bullshit inefficient numbers games being played by manufacturers. What actually matters is static pressure vs airflow and this is down to good engineering of air paths and filters/bags. One of my design lecturers worked on the original Electrolux uprights and was confident 500W would do fine if the airflow was right.