It's portable for sure, but as it's manually heated I would say it doesnt feel super discrete. I mostly use it at home because I love the function and I medicate all day. It's great for taking on the trail or hitting in the car, etc but I would feel wierd heating it up out in public even here in OR (i feel far more comfortable w/ my Crafty and dosing pods if I'm sneaking a puff while out and about).

It can be heated with just about any heat source but ive found a little butane torch lighter is convenient, relatively discrete and easier than a traditional BiC type lighter (which takes forever and doesn't heat very evenly).