For about a year my favourite butane vaporizers that heat the herb indirectly were the Vaponic, Vapman and Vapcap. After using the S for about five months I know I can add the Roasty on that list.
As already mentioned in this thread the Roasty consists of three parts: the wooden mouthpiece, the glass heating tube and an O-ring.
I prefer a medium/fine grind, because with a too fine grind the herb can get past the glass screen which results in a bit of "salad" in your mouth. I tamp the load against the glass screen because it's a conduction vaporizer.
Heating is very easy: the first heating cycle takes five seconds, and the subsequent heating cycles take about 2-3 seconds, sometimes and extra 4 seconds if I desire bigger clouds.
The vape signature is in my experience a hybrid between the Vapman and Vapcap with the higher temperatures, and the Vaponic and the Vapman with the lower temp hits. I think that the taste isn't as "terpy" and "in your face" as the above mentioned vapes with a microdosis (about a full Vapman pan), but it comes very, very close. Overall I think that the taste is suberb, especially if you like a little robust touch in your vapor.
The Roasty is, even compared to the Vapcap, the most "Jointesque" experience: the airflow is restricted the way I load the tube, so I take puffs like it's a cigar.
From an aesthetical perspective: there are all kinds of Roasties with different kind of woods, so I imagine that everyone could find a Roasty that's pleasing for the eyes. I own four Dreamwood products, and all the woodwork is nicely finished. Even the glass tube seems to be high quality. I dropped the glass tube a week ago and it survived the drop!
In short: If you're looking for a basic, easy to handle butane conduction vaporizer with pure taste, then the Roasty could be your vape.