+1 on what the others already said.
For nitpicking and for purpose of perfection chasing:
- The backside on the "bowl" seems to straighten out, instead of continuing to eternity with a continuous radii, like on the frontside.
- There seems to be a slight bulge underside of the stem, on the shank end.
- The backside facet-edges doesn't quite play along with the frontside facet-edges. (Probably because of the backside-bowl-straight-thing..)
- Edges are a bit too rounded (Probably from buffing?). Makes the pipe look a bit "lumpy".
- The right cheek seems to have a bit too much material on it. (This adds to the slot-rotation thing, pointed out by Mr. Oklahoma..)
- The top-bowl needs some charisma, it's a bit impersonal...
- The side panels seem to be dead flat, little roundness is required there.
But as said before, it's a good piece. And I'm just beeing picky

...
Very brutal shape, as it reveals all flaws instantly.
LatakiaLover wrote:Excellent job given the beastly difficulty of holding long lines and maintaining symmetry. A shape as plain as that exposes every weakness in your tool-handling game. Props for simply attempting it.

Do I sense a little softening for the Horn shape? Perhaps even a little, itty bitty, tiny liking for it?
