About the gloves: XL size fit my hands well. Construction is similar to any typical cheap ski glove; it should last without falling apart if you don't use it for labor such as snow shoveling.

About the heat:

One glove instantly smoked switch in the battery pack when I inserted the batteries. I checked the glove with a meter; the heating element was a dead short.

The other glove produced a good amount of heat that I was pleased with. On high setting the resistance of the heating element for this glove is 12 ohms, so it should draw right around .4 amps from the batteries. ( 4x AA in series is about 4.5-5V dc ) There is a velcro strap across the top of the glove that can be tightened to bring the heating element against the top of your hand. This feature works very well. Also noteworthy is that the top of the glove itself didn't get hot.. the heat stayed inside the glove, directed against the back of my hand. There are no finger or palm elements, just the back of the hand is heated.

The LO/OFF/HI switch is flimsy, but worked.

Overall a good value IF they work. Since it costs me nothing I arranged for UPS pickup and exchange of the same product. If I can get a set that works ( and keeps working ) it will be well worth the price paid, $24.

EDIT: The new pair arrived today and they work fine. Gobs of heat from both on HI setting. Two more things I noticed... #1 if I wind up using them for a lot of cold days I'm going to cut a little hole for the switch so I don't have to un-velcro the battery pocket each time I want to turn them on and off. #2 the gauntlet of the glove is actually big enough to cover the sleeve hole of a Fieldsheer Siberia cold weather motorcycle coat. I was worried the glove would have to go inside the sleeve, potentially letting in cold air. This was not the case.
All I need now is a few cold motorcycle commutes to try them out.

EDIT AGAIN: The gloves worked well to keep my hands warm during cold rides, but on the 6th time I used them to commute to work the left glove smoked the switch and died. Heating aspect of these gloves clearly has quality issues. That's two of two pairs! Total failure. I'm left with a cheap pair of ski gloves.

NOT RECOMMENDED!! VERY POOR QUALITY!!