My first vape was a titan II. Good unit for the money. and half of the portables in the $59-$99 are re-branded Titan1 or Titan II. IMO the best dry herb portable is the DaVinci Ascent that goes for around $160. I find only the $399 Mighty to be a match for it.
I have seen several very good reports on the DaVinci Ascent. My first inexpensive vape was a G Pro. It functions exactly like a Titan II, but I've found that the mouthpiece doesn't always stay on. Also, what appeared at first to be a heat separation area on the mouthpiece developed into a full blown crack and eventually a tiny piece of the mouthpiece broke off. It'll be interesting to see if the Titan II is a better built unit.