No perfect 1 Vacuum for all.

You need to know what u looking for and what u can compromise.

For Cordless Longer battery run will need to sacrifice lower suction power and bigger battery that add up weight.

Light weight easy to maneuver will need to sacrifice shorter battery run and weaker suction power.

Strong suction power will contribute to more weight and lower battery life.

Usually u need to choose between this 3 combinations below :-
1. High suction, long battery run - which is bulky and heavy
2. Balanced suction, moderate battery run - which is not too heavy but not the lightest
3. Light weight, often comes with short battery run and lowest suction power

Then for cordless a lot of brand does not pass the fog test or have leaking, meaning u redistribute fine dust to your house environment because the dust picked up leaked.

So far Dyson is really the best in all aspects especially in term of filtration, however their unit is less serviceable because only the bin is removable for cleaning compared to China counterparts that can easily stripped apart for washing.