Not the OP but I've also had a Surface Go for a while. I use it to fill the following niche:

A device that is light, small, fanless, has a usable keyboard and touchpad, runs a real OS, can be used to write and debug code, has built-in LTE, runs a Kindle app.

Other than a tendency to hang on reboot (shared with previous LTE Surfacen I've used), I've liked using it. I stopped carrying a tablet (iPad or Samsung Tab) with me when traveling since the Suface Go does pretty much everything a tablet does and is not much larger/heavier, and also replaces a laptop on short trips. Since phones are now so large (I use a Note 10+), I typically read books on my phone anyway, reducing the need for a tablet sized device for that purpose. On longer trips I carry both the Go and a regular laptop.