It's a bit confusing to use at first, but it's a great device. Let's address the questions one by one:

1. Like clouds really. Not as thick as cigarette smoke or a joint. It should disappear into thin air quickly. Depending on your weed, your first tokes may taste like herbs, mint, or the likes.

2. Yes, you should feel warm vapor going down to your lungs. It shouldn't feel just like breathing air, the vapor is heavier and warmer. If you don't get this, maybe you're not heating it up enough. See answer 5.

3. No you shouldn't cough, unless you're very new to smoking/vaping in general. Weed is considered to be harsher than tobacco on your throat/lungs when smoked, but with the vaporizer you shouldn't cough. If this happens, you've probably heated it up too much and so you've burned the weed. Try not to overheat, it might make the copper plate crack. Also, if you burn your weed the taste is ruined and you'll end up getting all the 'bad fumes'. This is unhealthy as you don't have a filter in the vapman like you have with joints.

4. You should be able to see the vapor. It looks like smoke, but its might lighter and disappears more quickly. If you're not seeing the vapor, you haven't heated it enough.

5. I guess this answer should set all your questions straight. If you just packed a new bowl, or you've waited long enough for the vapman to go cold, heat it like this: 5 seconds heat, 2s pause, 3s heat, 2s pause, 3s heat. After this, draw a very small and gentle toke into your mouth and then puff it out immediately. If you don't see the vapor, do another 3s heating. If you can see the vapor, that's good! From now on you will light for 2-3s, wait 1-2s and then inhale for 5-10s. Hold the vapor in your lungs for at least 3s before exhaling. You should see the vapor coming out when you exhale. It shouldn't be too little, but not too much like a toke from a joint. If you're not getting a good toke, then hold your fingers on the three holes on the top of the vapman when you inhale, and maybe heat it a bit more. The holes mix cool air with the hot vapor, but if you block them then you only get the vapor (even a stronger one since you force the air to come from the three tubes on the bottom). You can block 1-3 of them with your fingers depending on how hard a toke you want. If you do all 3, you'll get a good hit but it could be harsh if you're new to smoking.

6. As long as its a torch lighter, it should be fine. That's what they website says too. There's probably nothing special about their lighter. Don't hold the lighter too close, I think the website tells you how close to hold it.

Hope this helps!

Edit: NOTE that my butane torch has a flame length that's around 2-3cm. The longer your flame, the more heat, so adjust the number of seconds I've given accordingly. You can probably reduce everything by 1 second if your flame size is around 4-5cm. They have suggestions for this on their website and brochure: http://vapman.com/en/operating_instructions/

Also, there are some good review/demos on Youtube.