The one you linked is for concentrates (shatter, bubble hash not dry herb).The one I linked (which is the the one I use myself) is for just normal ground dry herb like you put in a mighty. Some of them can do concentrates as well - even in the same hit so you combine shatter with dry herb.
It's basically just a handle connected to a head full of little glass balls with a coil wrapped around that heats it up. The balls hold the heat so you can pull a shitload of air through quickly and not cool them too much. So you put a bowl full of herb on top of your bong, then lower the 'head' very close to it (it sits on top of the bowl). As you breathe in it sucks in the air through the hot balls. It's really similar to a normal bong experience, no need to breathe slow or whatever just the best taste possible from vapes.
The end result, is kind of like your tiny might on the 'on-demand' mode, with a bowl 3-4 times bigger, with the cooling of a bong, and you can evenly roast the entire bowl in one or two pulls and take a massive breath, breathing in as hard as you like.
It's worth a look... even if you think you never want to suck a lot of air through balls...even if they were really hot balls.

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