Just ordered a refurb 2017 13" TB 16/512. There are a whole lot more 2017s in the refurb store now than 2 weeks ago, and at better prices. I'm returning a nTB with same specs that I ordered new on Black Friday. The nTB fan spins up constantly while watching video and when running Windows in Parallels. I like the physical Fn keys better than the touch bar, but I can't stand the fan noise. The TB supposedly has better cooling in addition to a better video card and wifi.
I'm moving from a late 2013 to a 2017 model. Here are my thoughts so far:
Ports: Using about $70 of adapters, I was able to hook up two external monitors, 4 USB devices, and power, all through one USB-C port, which is awesome. When I get to my desk I just plug in one cord and everything is connected. I do miss MagSafe when not at my desk, but I found a $10 magnetic adapter that plugs into my travel charger so not a hard fix.
Keyboard: Not as bad as I feared, but not as good as the previous generation. The key travel is really small and it's louder. I'm not really bothered by the noise though as I do most of my typing using a Unicomp Model-M, which is about as loud as keyboards get.
Speakers: Definitely improved over the previous generation.
Trackpad: My first apple laptop over 20 years ago was the "blackbird" 520, which had the industry's first trackpad. I enabled tap-to-click on that one, and I'm surprised it wasn't turned on default on the new ones. Force touch feels kind of strange, but it's nice that you can click on the edges of the trackpad now and still have it register.