I had an AtmosRaw that I used for about two weeks until the battery switch stopped working. I didn't pursue a return on it. It worked pretty good for dry herb but seemed kinda small for it. I got 1-1\2 - 2 puffs on it before reloading.
Two things I don't like about it; the 9-second shutoff on the battery - if the chamber didn't get hot enough before the battery shutoff, it would cool back down again before you could try again. Kinda spoiled the puff, and the battery uses a 710 thread which is almost exclusive to this chamber. You can buy replacement Atmos batteries, but that's it.
I now have an Ago G5 heating chamber and an ego-t 1100mah battery. The Ago chamber differs from the Atmos by using the widely common 510 thread. Since it fits all the ego batteries it opens up a huge selection of battery choices. You can now use variable voltage or have different sizes & spares, plus add other chambers, like a glass globe, to the same batteries. None of these batteries have the 9-second shutoff. Solved pretty much both my dislikes about the atmos.
I've used my ago-ego for about a week now exclusively with wax. I have not used dry in this chamber at all. The wax works really well, I like it. I pack the chamber and it lasts all day, and I can share it with my friends too without having to reload it each time. I can take a small (650mah) battery on it when I go out and it fits nicely in my pocket, or if I'm out on a weekend I can take a big powerhouse 1300mah battery that will last quite long.
I recommend this route if you're going use a portable pen vaporizer, buying the chamber and the battery separately. Typical battery size in the starter kits is 650mah and that's probably too small to start with, plus you gain nothing else but a pretty box.
I think the Ago battery in the starter kit has the 9-second shutoff. Don't buy the kit. You'll pay the same or less, with more options, if you buy the chamber/battery separately.
You'll probably want at least an 1100mah to start with. 1300mahs are getting cheaper now and the prices of chambers is dropping as well.