I recently had a custom tulik made for me and after a month of wearing it paddling around Victoria I'm glad to say I am more then happy with it.
It was made by Paulo Ouellet who is starting a small company www.comfortpaddling.net
Paulo came by and after measuring me up, showed me some Goretex cloth samples and within a week had the tulik ready. It's both breathable and water proof, all the stitches are seam taped and the wrist gaskets are super heavy duty. I suspect they'll be far more robust then those found on typical dry suits.
Best of all is the seal around your face. Cinch it down adjust the Velcro on the sides of the hood and you have a water proof seal that does not feel like your face has been shoved through a rubber hose.
I've been wearing the tulik over my dry suit. If I didn't go swimming as much as I do I'd just wear it over a wet suit or a pair of dry pants and a sweater that Paulo also made for me. Paulo wears his over the fleece sweater and dry pants. Of course he doesn't go in the water as much as I do. The sweaters have removable hoods designed to be worn under the tulik hood. They're perfect for these cold winter days.
Here's a brief video of the tulik in action.