It is still the same idea though that you can have two low power settings or increase it to maximum (Turbo Boost) if you wish.
You said with the Autosense some areas of the carpet are cleaner than others which may be true, but it is the same with the Eco feature on the Numatics also! If you clean some areas of the carpet Eco (as you end up doing if you forget to press the button after turning it on and don't want to bend down again) then switch it to Hi for others.
If the standard Numatic didn't already have a Hi/Lo switch I'd say it is a good idea but you really aren't getting anything new with the Eco models, except the fact the vacuum makes the decision to start in Lo instead of you.
Some users prefer to vacuum on full power all the time which they can do on the standard models, but with the Eco ones they have to press the boost button every time you turn it on.
You said with the Autosense some areas of the carpet are cleaner than others which may be true, but it is the same with the Eco feature on the Numatics also! If you clean some areas of the carpet Eco (as you end up doing if you forget to press the button after turning it on and don't want to bend down again) then switch it to Hi for others.
If the standard Numatic didn't already have a Hi/Lo switch I'd say it is a good idea but you really aren't getting anything new with the Eco models, except the fact the vacuum makes the decision to start in Lo instead of you.
Some users prefer to vacuum on full power all the time which they can do on the standard models, but with the Eco ones they have to press the boost button every time you turn it on.