I agree, they are 'wow'. And your sample showing them is great. Nice to see our elmo back :)

Slick new sans serif with solid counters takes advantage of new FS features. This is the kind of typeface I was waiting for. You have found the optimal proportions for each letters. They look very pleasant, very natural. The solid counters give the text a striking visual impact: it is almost like a rhythm, or some times total "arrhythmia". They also make this font a stencil, save but a few glyphs; a very useful feature in everyday applications. The special characters are just beautiful. They blend in very well with the overall design. Likewise, the diacritics: they are measured, and well positioned.

There are a few things you can do to further improve zynesthesia:

1. Optical adjustment for the rounded glyphs. In case of this particular fontstruction this problem is hardly noticeable. Yet with refined control over the nudge function it is now possible to set the perfect overshoot at will. 

2. Same width for all strokes, diagonals included. Again, this is not very visible in this case. However, with careful nudging and use of special composites this issue could be taken care of.

3. Improved tracking with the new fractional letter width function. This point only applies within Fontstruct preview as a substitute to kerning.

Wonderful demo pictures with turbulent flow. 10/10

Congratulations on the "new curve-y" TP :)

yummy 

I just love your fonts!  I wish I could figure out how to filter the way you do.