I got the mixed-weight version. I think the home-row keys are 30g, whereas the ESC key is 55g (and some of the other keys are 45g). There's a noticeable difference between the two, now that I know it's there, but I honestly didn't notice until I went looking for it, and I don't think I would notice during everyday use.
What disappointed me was the very minimal tactile feedback (on the 30g keys, at least... it's more pronounced on ESC). If you like Cherry Red's, this may not bother you. It's *not* linear, but it doesn't have the solid bump of a Brown/Clear, or even the mushy bump of a standard rubber-dome.
What's been winning me over, however, is the smooth typing action. I think the Cherry Blue's are more fun to *push*, but the Topre definitely a good keyboard for *typing*. (I won't go on record yet as to which I prefer, yet, since they're very different experiences.) The keycaps feel nice, and the typing sound is quiet, but pleasantly "solid" (unlike a rubber dome).
It's also very sturdily built, and there was a lot of attention paid to the details... unless my fingers are deceiving me there's a slight texture difference between the F/J and the other letters, in addition to the standard nub.