To be perfectly honest i have no practical experience of such small spindles. If it has got positive reviews then that should be an indication that it should work at least reasonably.
The torque is given in a slightly opaque dimension of gram-centimeters but if my arithmetic works, that translates to about 0.5 Nm. Aluminium could be a challenge but you never know.
It seems to be a regular DC motor with brushes that will wear out eventually, but that won’t hapopen anytime soon if the quality is at least reasonable. I’d say go for it because the price is not bad.
P.S. I mentioned Kress router motors: http://www.kress-elektrik.com/Power-tools.71+M5aabe1784b7.0.html?&tx_commerce_pi1[catUid]=17&tx_commerce_pi1[mDepth]=1&tx_commerce_pi1[path]=2%2C68
I tried to check the weight of the Chinese spindle but could not find it. The Kress is over a kilo so may be too heavy but it is definitely a quality item and will turn some 29 kRPM where the Chinese one does 15.