the new nozzle is good
The new nozzle workss very well, it will definitely give excellent carpet cleaning ability to a straight suction canister, backpack, or central vacuum with a nonelectric hose. It should also work with the hide-a-hose system although you will need a wand since the nozzle does not have a built in extension handle. It does have some similarities to the power nozzles that are included with the Perfect canister vacuums.
The nozzle has an L shape which helps with cleaning up to the edge, there are two buttons on the top of the nozzle, a rectangular power button that you can reach down and press or you could also press it with your foot, and a small reset button. I'm assuming the nozzle shuts off if the brush becomes jammed but I have not tested this.
The battery pack is rectangular and fits in to a compartment on the top of the nozzle. You will hear the battery click in to place. To release it, press the latch and lift the battery out of the compartment. The charger plugs in to the bbattery itself rather than the nozzle. It is possible to charge the battery while attached to the nozzle as well. In a previous post, Eurekaprince mentioned wanting a nozzle that allowed you to charge one battery while using the nozzle with another one, if you purchase a second battery this nozzle would allow you to do this.
So, which one is better, the Centec nozzle or the Volt? I would say one is not better than the other, each nozzle offers things the other one does not.
The Volt has a built in extension handle so a wand is not needed, it also has a fan which provides extra airflow, it would be interesting to compare these nozzles side by side to see if this makes any difference. The Volt also has a headlight. I think both nozzles spin their brushes at a similar speed but I have no way to test this.
The Centec nozzle has a few things that the Volt does not have. It uses a Poly-v belt rather than a flat belt which should allow the belt to last much longer without requiring replacement. It also appears to be better sealed preventing debris from remaining in the nozzle. The battery can also be changed very easily allowing you to use the nozzle with one battery while charging another one. The Centec nozzle is also cheaper than the Volt. So, when deciding which nozzle to get, you really need to consider what features are most important to you and purchase the nozzle that has those features.