Actually it's a wonderful experience. The only gripe I have really is that the gun isn't properly "attached" to the touch controller. I'm not really sure how to best describe it, but basically it seems like it's pivoting around a point that isn't actually on the controller (which isn't entirely surprising given that the Vive's controllers have a considerably different shape). So for the most part it doesn't really feel like I'm actually holding the gun. It isn't so off that I can't play the game, because I absolutely can, but it's noticeable. It's most noticeable when I hold the controller upside-down.
It would be awesome if we could actually pick up the gun and hold it (using the grip buttons), and perhaps even have a holster or something for it. Though that might get understandably tricky if you're planning to add more weapons that we can keep with us like old games this seems kinda inspired by (which would be even more awesome!). It would make need for a hand toggle option unnecessary though.
I also noticed you asked another Touch user what the teleporting was like, so I figured I might as well tell you about that too. The left controller handles all of the movement. The slightest touch of the analog stick displays the teleport arc, and clicking it teleports you to where you were aiming. The grip button is the manual locomotion, with you moving in the direction the controller is facing. The Y button is the "experimental" auto-move locomotion. And the trigger on the right controller shoots the gun. So everything functions exactly the same as the Vive controllers do as far as I can tell (and as I honestly expected it to).
As before, I can't wait to see more of this! <3