I have two tadelakt KCs and I like the leather. It is a hybrid of box and swift - its a bit more matte than box (it doesn't develop the same patina as box) and its sturdier than swift. My KCs are also lined in chevre, whereas my swift items are lined in swift.
Like swift, tadelakt holds color very well. Most bright colors look very vibrant in this leather.
The price point is similar to box and swift, but tadelakt is slightly less expensive. On Oct 24th, Jag posted that her SA had a beige swift KC for $4150 and I purchased my tadelakt thalassa blue KC in mid October for $3525 (both prices are pre-tax).