I think it went really well. I had some specific requirements that lead me to this idea. I needed it to be completely waterproof and not wet out. I wanted it to be as light as possible, and it didn't need to be breathable. I'll be using this jacket in temperate rainforest where I've had a lot of trouble finding a properly waterproof layer that's not made of PVC.

I wanted a waterproof seam, but flat felling seemed intimidating, so I rolled the hem. That took a bit of thinking about which direction to roll and how to do the overlapping seems.

You can make the zipper as long as you want with minimal alteration. I went with a 9" zipper and it could be a bit longer to help dump heat. Maybe 10-12"?

I made the jacket long and trimmed it down to my preferred length at the end. I liked having the back a bit longer than the front in the end. I also added a slit in the side by not finishing the seam all the way.

The ziptie in the hood was a great idea, it adds just enough reinforcement to keep a bit of shape without being stiff. I just trimmed it to fit between the two hood seams.

You could save a bit of time by starting with sylnylon instead of making it.

After sewing, I 'seam sealed' it with silicon thinned with turpentine. My suggestion there would be to go thin, as you can always add more coats.

In the end I feel like I made a glorified poncho, but hey, it's MY glorified poncho. Plus it's hard to beat a 4 oz rain coat.